Which statement is correct about defining the target population?

A) Imprecise definition of the target population will result in research that is ineffective at best and misleading at worst.
B) Defining the target population involves translating the problem definition into a precise statement of who should and should not be included in the sample.
C) The target population should be defined in terms of elements, sampling units, extent, and time.
D) All of the above statements are true.

D