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Cost is used because past tense is required.


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In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost him the entire Eastern Front.

A. In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost --- faulty touch rule of 'which' and the logical referent lacking --, which refers to Hitler's invasion, which is absent.

B. In the winter months of his campaign, Hitler invaded Russia in the German occupation of Eastern Europe in 1941-42, which was a singular strategic error that ultimately cost -- the same thing as in B.

C. With the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of his campaign, making a singular strategic error that ultimately cost --- Looks as if Hitler and the German occupation both invaded Russia. - Absurd logic.

D. During the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of the campaign, making a singular strategic error that ultimately cost --- correct choice

E. Invading Russia in the winter months of his campaign, in the German occupation of Eastern Europe in 1941-42, Hitler made a singular strategic error, ultimately costing--- the intrusion of the second modifiers spoils the show.

Should not it be 'costs' instead of 'cost' in option D?

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I think you are thinking about subject verb agreement and that it should be costs because costs is singular

However, the past tense of "cost" is also "cost"....confusing I know.....here "cost" is used in a past tense to mean that Hitler's error cost him the Entire Eastern Front (since Hitler "invaded", both the event and the implications of the event must have occurred in the past)
Therefore, it is not a singular vs. plural issue. The use of "cost" is correct.
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The word “during” correctly sets up the meaning, while the participle “making” maintains parallelism.

If you chose (A), remember that “which” typically modifies the immediately preceding noun. This answer choice suggests that Hitler’s campaign was a singular strategic error that ultimately cost him the entire Eastern front, when in fact it was the decision to invade in the winter months that ultimately cost him the entire Eastern front. The use of the coordinating conjunction “and” creates an illogical meaning by assigning equal importance to the phrases “was a singular strategic error” and “that ultimately cost …” The second phrase should be subordinated. When we say something “was A and B”, we are implying that “A” and “B” are of equal importance. In this case, one thing led to another. Hitler made a singular strategic error that ultimately cost him the entire Eastern front. The correct choice should make this clear.

If you chose (B), remember that “which” typically refers to the immediately preceding noun. This answer choice illogically suggests that 1941-42 was a singular strategic error that ultimately cost Hitler the entire Eastern front.

If you chose (C), you correctly removed “which” from the sentence and switched the verb form to the participle “making,” however consider how the word “with” changes the meaning of the sentence. This answer choice incorrectly suggests that Hitler invaded Russia through the 1941-42 invasion of Eastern Europe.

If you chose (E), you correctly removed “which” and “that” from the original sentence. However, it is structurally awkward to have back-to-back modifying clauses before the subject (“Hitler”). Furthermore, this choice adjusts the meaning of the sentence to: “Hitler made a mistake.” Additionally, “made” and “costing” are not parallel, and we now have three modifying clauses instead of two. (D) is more precise.
clauses instead of two. (D) is more precise.

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Respected Daagh!
isnt the right option has subject-verb disagreement? it should be *costs* not cost....can you explain what i am missing here?
Thanks


daagh
In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost him the entire Eastern Front.

A. In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost --- faulty touch rule of 'which' and the logical referent lacking --, which refers to Hitler's invasion, which is absent.

B. In the winter months of his campaign, Hitler invaded Russia in the German occupation of Eastern Europe in 1941-42, which was a singular strategic error that ultimately cost -- the same thing as in B.

C. With the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of his campaign, making a singular strategic error that ultimately cost --- Looks as if Hitler and the German occupation both invaded Russia. - Absurd logic.

D. During the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of the campaign, making a singular strategic error that ultimately cost --- correct choice

E. Invading Russia in the winter months of his campaign, in the German occupation of Eastern Europe in 1941-42, Hitler made a singular strategic error, ultimately costing--- the intrusion of the second modifiers spoils the show.
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sananoor
Respected Daagh!
isnt the right option has subject-verb disagreement? it should be *costs* not cost....can you explain what i am missing here?
Thanks


daagh
In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost him the entire Eastern Front.

A. In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost --- faulty touch rule of 'which' and the logical referent lacking --, which refers to Hitler's invasion, which is absent.

B. In the winter months of his campaign, Hitler invaded Russia in the German occupation of Eastern Europe in 1941-42, which was a singular strategic error that ultimately cost -- the same thing as in B.

C. With the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of his campaign, making a singular strategic error that ultimately cost --- Looks as if Hitler and the German occupation both invaded Russia. - Absurd logic.

D. During the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of the campaign, making a singular strategic error that ultimately cost --- correct choice

E. Invading Russia in the winter months of his campaign, in the German occupation of Eastern Europe in 1941-42, Hitler made a singular strategic error, ultimately costing--- the intrusion of the second modifiers spoils the show.
You see sananoor, instead of present we should use past tense of cost. Note the use of past tense invaded. Events are happening in past only.

Now the past tense of cost is cost in the sense of "this computer cost me £600", but costed in the sense of 'calculated', "the project was costed at $1 million."
So use of cost make sense in this sentence.

Hope this would address your doubt.

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awesome...thankyou so much...i really missed this important point here


a
alokgupta1009
sananoor
Respected Daagh!
isnt the right option has subject-verb disagreement? it should be *costs* not cost....can you explain what i am missing here?
Thanks


daagh
In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost him the entire Eastern Front.

A. In the German occupation of Eastern Europe in 1941-42, Hitler invaded Russia in the winter months of his campaign, which was a singular strategic error and that ultimately cost --- faulty touch rule of 'which' and the logical referent lacking --, which refers to Hitler's invasion, which is absent.

B. In the winter months of his campaign, Hitler invaded Russia in the German occupation of Eastern Europe in 1941-42, which was a singular strategic error that ultimately cost -- the same thing as in B.

C. With the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of his campaign, making a singular strategic error that ultimately cost --- Looks as if Hitler and the German occupation both invaded Russia. - Absurd logic.

D. During the 1941-42 German occupation of Eastern Europe, Hitler invaded Russia in the winter months of the campaign, making a singular strategic error that ultimately cost --- correct choice

E. Invading Russia in the winter months of his campaign, in the German occupation of Eastern Europe in 1941-42, Hitler made a singular strategic error, ultimately costing--- the intrusion of the second modifiers spoils the show.
You see sananoor, instead of present we should use past tense of cost. Note the use of past tense invaded. Events are happening in past only.

Now the past tense of cost is cost in the sense of "this computer cost me £600", but costed in the sense of 'calculated', "the project was costed at $1 million."
So use of cost make sense in this sentence.

Hope this would address your doubt.

Sent from my Redmi Note 4 using GMAT Club Forum mobile app
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It's sentence correction and stuff, but, guys, who came up with such hilarious fantasy? He invaded Russia in summer!

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