refers to observable differences in people, including race, age, ethnicity, physical abilities, physical characteristics, and gender. A. Surface-level diversity B. Deep-level diversity C. All-level diversity D. Longitudinal diversity

The correct answer is A.

Explanation:

The term diversity refers to the idea of abundance and variety. Diversity refers to the recognition of difference, dissimilarity, individuality, specificity and uniqueness. Surface-level diversity represents the observable variation and differences, that is, it is the diversity that constitutes all the marked (observable) differences that we humans present including race, age, ethnicity, physical abilities, physical characteristics, and gender which is part of a more complex social fabric and interacts with factors such as  socioeconomic status, ethnicity and age.

i would say b. research typically uses a variety of sources

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