This Experimental Design
(R) $\quad$ X $\quad$ $\quad$ Y₂
(R) $\quad$ - $\quad$

Multiple Choice

This experimental design
(R) $\quad$ X $\quad$$\quad$ Y₂
(R) $\quad$ - $\quad$ $\quad$ Y₂
Is recommended for studies in which

A) pretest reactivity is likely to occur.
B) no control group is available.
C) a large sample is available.
D) only a small sample is available.