Which of the Following Is True of the One-Shot Case

Multiple Choice

Which of the following is true of the one-shot case study preexperimental design (X O₁) ?

A) It does not provide a basis of comparing the level of O₁ to what would happen when X was absent.
B) There is no random assignment of test units.
C) Both A and B are correct.
D) In this design,a group of test units is measured twice.