Which Statement About the Scientific Method Is True

Which statement about the scientific method is true?

A) After forming a hypothesis,scientists apply logic to make predictions from the hypothesis.
B) The most informative experiments are those that have the ability to show that a hypothesis is correct.
C) In a comparative experiment,a scientist compares groups that differ in terms of a variable that has been manipulated in one of the groups and left unaltered in the other group.
D) Controlled experiments are valuable when we do not know or cannot control the critical variables.
E) A statistical test of a hypothesis starts with the premise that a significant difference exists between the groups in the study.