What Ethical Issue Was NOT Raised by the Famous "Tearoom

Multiple Choice

What ethical issue was NOT raised by the famous "Tearoom Trade" study by Laud Humphries on homosexuals?

A) Covert observation without informed consent
B) Protecting the research subjects from legal jeopardy
C) Protecting the privacy of respondents and confidentiality of data
D) The use of deception or lying to subjects
E) All of the above were involved.