In Striving to Achieve Cultural Proficiency in Formulating Research Questions

In striving to achieve cultural proficiency in formulating research questions and hypotheses, which of the following is true?

A) Concepts do not necessarily have equivalent meanings across cultures.
B) Measures of success are consistently similar across diverse cultures.
C) It is necessary to focus exclusively on the positive consequences of research involving culturally diverse populations.
D) It is useful to employ generic variable labels to indicate specific subgroups within a culture.