Which of the following is an example of an independent regulatory commission?

When working with small numbers of participants, the use of free random assignment

A) might result in unequal groups on important variables. B) is preferable to matched random assignment. C) prevents unequal groups from forming. D) is the only allowable assignment procedure.

In metropolitan areas, different types of people live in close proximity and are socially and economically dependent upon one another

Indicate whether this statement is true or false.