The BEST supporting detail to the answer to Part A about the text's central idea is A. "So that when you have ..." (Paragraph 10).
Colorism is a tool used in the Caribbean, especially in the Dominican Republic, to intentionally remind its citizens of the pains their country experienced due to Haitian rule, according to "BEHIND CLOSED DOORS: 'COLORISM' IN THE CARIBBEAN" by Michel Martin.
Thus, the best detail that shows that Colorism is a devastating factor in the racial harmony of the Dominican Republic is Option A.
Learn more about Colorism in the Dominican Republic here https://brainly.com/question/11587332 and https://brainly.com/question/15222019