What does it mean to analyze the diction of an author

Which is an example of perfect iambic pentameter? a. "i have been worth the whistle." b. "whose reverence even the head-lugg'd bear would lick," c. "a man, a prince, by him so benefited! " d. "ere they have done their mischief. where's they drum? " e. "marry, your manhood, mew! "