Which of the following is true regarding a needs evaluation? a. It is an unstructured investigation used to address the needs of an individual in order to help him or her acquire specific services b. It is a systematic investigation of the needs of a group, community, or organization for specific services or policies. c. The strategy for conducting a needs evaluation never changes across setting or situation. d. When choosing an approach for the needs evaluation, one should only take into account the strengths and weaknesses of each approach