Which of the Following Is True

Which of the following is true?

A) There are no ethical guidelines governing how far scientists can go in their pursuit of knowledge.
B) There are ethical guidelines governing how far scientists can go in their pursuit of knowledge, but they are based on each scientist's own moral compass.
C) There are ethical guidelines set forth by the Belmont Report detailing how far scientists can go in their pursuit of knowledge.
D) Scientists are not allowed to use any form of deception or harm when conducting studies.