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From 1900 until the 1930s, pellagra, a disease later discovered to res

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From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 22 Jun 2018, 08:03
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GMAT® Official Guide Verbal Review 2019

Practice Question
Question No.:
Online test bank question number : CR01298

From 1900 until the 1930s, pellagra, a disease later discovered to result from a deficiency of the vitamin niacin, was common among poor cotton farmers in the United States whose diet consisted mostly of corn, the least costly food they could buy. Corn does not contain niacin in usable form. Curiously, during the Depression of the early 1930s, when cotton's price collapsed and cotton farmers’ income declined, the incidence of pellagra among those farmers also declined.

Which of the following, if true, most helps to explain the decline in the incidence of pellagra?

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.

(B) People whose diets consist largely of corn often suffer from protein deficiency as well as niacin deficiency.

(C) Until the discovery of pellagra's link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.

(D) Effective treatment for pellagra became available once its link with niacin was established.

(E) In parts of Mexico, where people subsisted on corn but pellagra was uncommon, corn was typically processed with alkaline substances, which make the niacin in the corn absorbable.

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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 22 Jun 2018, 08:26
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GMAT® Official Guide Verbal Review 2019

Practice Question
Question No.:
Online test bank question number : CR01298

From 1900 until the 1930s, pellagra, a disease later discovered to result from a deficiency of the vitamin niacin, was common among poor cotton farmers in the United States whose diet consisted mostly of corn, the least costly food they could buy. Corn does not contain niacin in usable form. Curiously, during the Depression of the early 1930s, when cotton's price collapsed and cotton farmers’ income declined, the incidence of pellagra among those farmers also declined.

Which of the following, if true, most helps to explain the decline in the incidence of pellagra?

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.
Correct...
Since the farmers changed their diet, the changes occured.


(B) People whose diets consist largely of corn often suffer from protein deficiency as well as niacin deficiency.
Out of scope

(C) Until the discovery of pellagra's link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.
Again, not close by. Out of scope

(D) Effective treatment for pellagra became available once its link with niacin was established.
we are not talking of treatment but drop in cases

(E) In parts of Mexico, where people subsisted on corn but pellagra was uncommon, corn was typically processed with alkaline substances, which make the niacin in the corn absorbable.
we are not talking of Mexico. We cannot relate what happened there with USA

A
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 22 Jun 2018, 08:32
Question Type: Explain/Paradox

Argument: Corn is cheap and doesn't contain niacin. Farmers --> poor --> consume corn --> suffer from vit. deficiency i.e. Pellegra.
Farmers income decreased further. However, Pellegra incidence also reduced.

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption. - Correct. The diet of poor farmers was diversified and hence essential vitamins were consumed, thereby resulting in fewer incidences of Pellegra

(B) People whose diets consist largely of corn often suffer from protein deficiency as well as niacin deficiency. - Irrelevant.

(C) Until the discovery of pellagra's link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person. - Again irrelevant.

(D) Effective treatment for pellagra became available once its link with niacin was established. - Out of focus. We are worried about the incidence of Pellegra and not about its treatment.

(E) In parts of Mexico, where people subsisted on corn but pellagra was uncommon, corn was typically processed with alkaline substances, which make the niacin in the corn absorbable. - Incorrect for 2 reasons. 1: Talks about Mexico. 2: Talks about the area where Pellegra is uncommon.

Answer: A
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 22 Jun 2018, 08:33
The answer is A.

We can find this answer using the

Precise

strategy, since the question gives us enough information to figure out what we are looking for.
We are told that cotton farmers consumed corn, which doesn't have enough Niacin, and thus suffered from pellagra. However, when they had less money, they stuffed suffering. What could explain this? Well, it follows from less pellagra that they consumed less corn (since this is what caused it), and the change in income could explain this. So, the farmers probably consumed less corn, and consumed something cheaper with more Niacin. This is exactly what (A) tells us: When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 26 Jun 2018, 08:40
A should be the correct answer.

E is incorrect though tempting as it talks about mexico and it is not giving any proper reason why the number of people suffering from pellagra declined while farmers' income dwindled and cotton price declined.
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 26 Jun 2018, 11:33
hazelnut wrote:
GMAT® Official Guide Verbal Review 2019

Practice Question
Question No.:
Online test bank question number : CR01298

From 1900 until the 1930s, pellagra, a disease later discovered to result from a deficiency of the vitamin niacin, was common among poor cotton farmers in the United States whose diet consisted mostly of corn, the least costly food they could buy. Corn does not contain niacin in usable form. Curiously, during the Depression of the early 1930s, when cotton's price collapsed and cotton farmers’ income declined, the incidence of pellagra among those farmers also declined.

Which of the following, if true, most helps to explain the decline in the incidence of pellagra?

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.

(B) People whose diets consist largely of corn often suffer from protein deficiency as well as niacin deficiency.

(C) Until the discovery of pellagra's link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.

(D) Effective treatment for pellagra became available once its link with niacin was established.

(E) In parts of Mexico, where people subsisted on corn but pellagra was uncommon, corn was typically processed with alkaline substances, which make the niacin in the corn absorbable.


With (A), as it talks about consumption of other food items during the Depression.
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 26 Jun 2018, 18:58
What is the paradox here. ? farmers usually eat corn. and corn does not consist niacin. however when production of cotton decreased, so does the incidence.evidently it has something to do with cotton and nothing to do with corn. Option A is on same lines and must be the answer.

Which of the following, if true, most helps to explain the decline in the incidence of pellagra?

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res  [#permalink]

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New post 26 Jun 2018, 23:50
hazelnut wrote:
GMAT® Official Guide Verbal Review 2019

Practice Question
Question No.:
Online test bank question number : CR01298

From 1900 until the 1930s, pellagra, a disease later discovered to result from a deficiency of the vitamin niacin, was common among poor cotton farmers in the United States whose diet consisted mostly of corn, the least costly food they could buy. Corn does not contain niacin in usable form. Curiously, during the Depression of the early 1930s, when cotton's price collapsed and cotton farmers’ income declined, the incidence of pellagra among those farmers also declined.

Which of the following, if true, most helps to explain the decline in the incidence of pellagra?

(A) When growing a cash crop could not generate adequate income, poor farmers in the United States responded by planting their land with vegetables and fruits for their own consumption.

(B) People whose diets consist largely of corn often suffer from protein deficiency as well as niacin deficiency.

(C) Until the discovery of pellagra's link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.

(D) Effective treatment for pellagra became available once its link with niacin was established.

(E) In parts of Mexico, where people subsisted on corn but pellagra was uncommon, corn was typically processed with alkaline substances, which make the niacin in the corn absorbable.


Imo A

A is our answer as when the cotton prices collapsed then the farmers had no choice other than to plant other crops such as vegetables, leading to decrease in cases of pellagra.

B Irrelevant as we not concerned protein deficiency.

C Again it is irrelevant

D Well this choice is tempting but we are not concerned with the treatment of the pellagra. This may be true but we do not know whether the treatment became available in 1930 or later .

E Irrelevant
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Re: From 1900 until the 1930s, pellagra, a disease later discovered to res &nbs [#permalink] 26 Jun 2018, 23:50
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