Which of the Following Is the Best Argument in Support

Multiple Choice

Which of the following is the best argument in support of Humphrey's research?

A) The men knew they were engaged in illegal and risky behavior.
B) The men were in a public place so there was no expectation of privacy.
C) Humphrey's did not reveal that he had observed the men when he interviewed them.
D) His findings led to a better understanding of human sexuality and stigma.