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29 May 2019, 04:15
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
87% (01:34) correct
13%
(01:55)
wrong
based on 186
sessions
History
Date
Time
Result
Not Attempted Yet
A diet that contains polyunsaturated fats and is low in saturated fats reduces the risk of heart disease. Fish are an excellent source of omega-3, a polyunsaturated fat they obtain by eating the green plant cells of plankton. But cows and other ruminants obtain omega-3 polyunsaturates when they eat grass. Therefore, a diet rich in beef and a diet rich in fish should be equally effective in reducing the risk of heart disease.
Which of the following, if true, would weaken the conc1usionabove?
(A) The diet of beef cattle can be monitored far more accurately than can the diet of fish.
(B) Consuming polyunsaturates reduces the amount of cholesterol produced by the liver and reduces the chance of blockage in coronary blood vessels.
(C) Studies have shown that people who eat fish only once a week have a lower risk of heart disease than do people who never eat fish.
(D) Medical researchers are expected soon to make a synthetic form of omega-3 that can be injected into beef.
(E) Cows and other ruminants convert most of the omega-3 polyunsaturates they consume into saturated fats.
Which of the following, if true, would weaken the conc1usionabove?
(A) The diet of beef cattle can be monitored far more accurately than can the diet of fish.
(B) Consuming polyunsaturates reduces the amount of cholesterol produced by the liver and reduces the chance of blockage in coronary blood vessels.
(C) Studies have shown that people who eat fish only once a week have a lower risk of heart disease than do people who never eat fish.
(D) Medical researchers are expected soon to make a synthetic form of omega-3 that can be injected into beef.
(E) Cows and other ruminants convert most of the omega-3 polyunsaturates they consume into saturated fats.
30 May 2019, 02:59
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Quote:
The right answer here is E. This is a "weaken the conclusion" question, so the first step is to identify what exactly that conclusion is. In this case, it is "a diet rich in beef and a diet rich in fish should be equally effective in reducing the risk of heart disease". Hence, we're looking to say that a beef diet would NOT be as effective in reducing heart disease.
A - This tells us nothing useful. If anything, it vaguely suggests that one can make sure the beef is filled with omega-3, thereby strengthening the argument. OUT
B - So what? This option is completely irrelevant. We want to compare heart disease for beef and fish consumption. This is just a dangling premise that adds to other premises. OUT
C - This option may appear to be relevant, but is actually not. It compares eating fish to not eating fish, but what we really want is the comparison of eating fish to eating beef. OUT
D - Again, this is irrelevant because we don't care about what might happen in the future. Whether this can be done or not has absolutely no impact on the argument because we're looking at how beef CURRENTLY affects heart disease. OUT
E - Must be right by elimination, but let's confirm nonetheless. This option undermines some of the info already given. We know that cows get omega-3, but this tells us that the omega-3 gets converted before we consume the cow. Hence, it actually does suggest that eating cows is not as good for reducing heart disease and is CORRECT.\
In a 'weaken the conclusion' question, the right answer will either:
1. Undermine information already given (as in E)
2. Introduce new info that hurts the argument (Eg - beef contains a high level of salt that actually causes heart disease)
- Matoo
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