Which of the Following Is TRUE

Which of the following is TRUE?

A) The psychogalvanometer is used to measure pupil dilation whereas the eye camera is used to record movements of the eye.
B) Response latency is the amount of time a respondent deliberates before answering a question.
C) Response latency when used to measure brand preference rests on the premise that the degree of latency is directly proportional to the size of an advertisement.
D) Voice pitch analysis attempts to assess the loudness with which people answer specific questions.
E) None of these statements are true.