I think the answer might be A
"diction" means word choice, aka the words that one chooses when writing or speaking. choice A uses this word correctly, because if you know more words, you'll be able to use "good diction" aka you'll have more words to choose from.
Flint, Michigan and Birmingham<span>, Alabama—1963. The </span>Watsons<span> as we know them hail from two very different parts of the country. Dad's family was all born and raised in Flint, Michigan, while Momma's family is from </span>Birmingham<span>, Alabama.</span>
I hope my answer has come to your help. God bless and have a nice day ahead!