Biology Forums - Study Force

Which of the following sentences is not grammatically correct?
a. The data was analyzed with a t-test.
b. Since the earliest days of psychology, many researchers have discussed the nature of the self.
c. When a student is not prepared for a test, he or she is likely to feel anxious.
d. As participants entered the lab, they received a packet of questionnaires.
e. all of these sentences are correct

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I was curious about this one, thanks for steering me in the right direction.

No problemo!