Which of the Following Is NOT a Reason Why Experiments

Multiple Choice

Which of the following is NOT a reason why experiments help researchers determine causality?

A) In an experiment, the researcher can control the causal sequence of two variables.
B) Because they take place in a controlled laboratory setting, experiments have greater external validity.
C) Participants can be randomly assigned to different conditions of the independent variable.
D) The experimenter can hold everything constant except for the variable being manipulated.