Which of the Following Is TRUE

Which of the following is TRUE?

A) There is no research on Mexican American folk healing practices and their effects.
B) Many people of African descent rely on inyangas, who are herbalists in charge of the physical health of the people.
C) Latinos are considered a homogeneous group, meaning that they are similar to one another regardless of where they live.
D) Healers (curanderismos) , like physicians require that people make appointments and complete required paperwork prior to treatment.