GMAT Verbal Reasoning Practice Test 4

Question : 75 of 100

Marks: +1, -0

there was a one-year delay between the completion of a pilot study for the experiment and the initiation of the experiment itself
people’s levels of immune-system activity are not affected by their use of medications
a few people with high immune-system activity had scores on the test of mental health that were similar to the scores of people who had normal immune-system activity
people who have low immune-system activity tend to contract more viral infections than do people with normal or high immune-system activity
high levels of stress first cause mental illness and then cause decreased immune-system
activity in normal individuals

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