The answer would be c) try
an activity you're interested in learning
(D) because "an apprentice" is singular, so it should have singular pronouns. "Their" should be "his or her."
"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.
