Which of the following is true about obtaining participants’ informed consent for an experiment?  a. It can be done before or after an experiment.  b. It does not need to explain the nature of the...

Which of the following is true about obtaining participants’ informed consent for an experiment?

 a. It can be done before or after an experiment.

 b. It does not need to explain the nature of the experiment, as this would give away too many details.

 c. Participants should be told what kind of experiences they are agreeing to undergo.

d. It is not necessary unless the experiment involves some sort of deception.