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Company X discovered that employees that have lunch before 13:00 are more productive than employees who have lunch after 13:00, or skip lunch altogether. The company management concluded that in order to increase employee productivity, it needs to encourage employees to have their lunch no later than 13:00.
Which of the following, if true, most strongly supports the company's conclusion?
This answer choice neither strengthens nor weakens the management's conclusion. A fixed lunch time (same time every day) does not necessarily have to be earlier than 13:00. In other words, according to this answer choice, having lunch every day at 14:00 should also result in higher productivity. This idea is not on par with the management's conclusion and cannot, therefore, help to strengthen it.
This answer choice neither strengthens nor weakens the management's conclusion - this statement does not tell us whether this group of employees (25-30 year old women) is more, or less, productive than an employee who eats lunch after 13:00, it cannot help us support the company's conclusion.
This answer choice strengthens the company's conclusion by providing a good example of a similar situation which produced positive results.
This answer choice weakens the company's conclusion. It does so by providing an example of an employee who although eats after 13:00, is the most productive in the company. This example casts doubt on the company's theory.
This answer choice weakens the company's conclusion. It does so by providing a factor that complicates the situation and prevents the company from being able to use its plan. If some employees are not hungry before 13:30, then they will not eat properly, or at all, at 13:00, a fact which may affect their productivity.