Excisions are NOT performed to remove which of the following?

A problem faced by African American athletes on college campuses is a feeling of isolation. Which of the following does NOT contribute to feelings of isolation?

A. White students who lack experience in racially diverse groups. B. Campus activities that don't represent the experiences of black students. C. Too many campus activities focused on the interests of Latinos and Asians. D. Racial and athletic stereotypes used by some people on campus.

When exposed to sunlight, the skin produces a molecule that is converted to ________, which the body needs for calcium absorption. 

Fill in the blank(s) with the appropriate word(s).