The answer is A, in any body paragraph, the main focus is getting your point across!!
A is not an example or a narrative writing.
Out of the choices given, the figurative language that helps support the extended metaphor of freedom versus oppression is "The caged bird sings; the free bird thinks."
The most appropriate reason why Brooks capitalized the words "Mostly Good," is to draw attention, and highlight this point, so the reader would receive better context, and a reason to think and use intellectual reasoning.