Which of the Following Is NOT a Problem Associated with Randomized

Multiple Choice

Which of the following is NOT a problem associated with randomized experiments?

A) Experiments can sometimes get expensive for the researcher.
B) The participants in the treatment group and the control group are not identical in all respects.
C) Getting immediate answers to some important questions may not be possible.
D) Sometimes experiments are conducted poorly, which may lead to inaccurate results.