Which of the following accurately describes nonequivalent group design? a. The researcher cannot control which people go into each group and cannot ensure that the groups are equivalent. b. The two...

Which of the following accurately describes nonequivalent group design?

a. The researcher cannot control which people go into each group and cannot ensure that the groups are equivalent.

b. The two groups have completely different characteristics.

c. The researcher randomly assigns people to groups, so there is no guarantee that the groups are equal.

d. The number of participants is different from one group to another.