<span>The correct answer is A. blank verse. Shakespeare wrote all of his plays using the blank verse - it is a type of verse written in the iambic pentameter (10 syllables in each line, unstressed syllable is followed by a stressed one) which has no rhyme. A free verse doesn't follow any poetic rules, a heroic couplet means that every two lines rhyme, and common meter refers to a stanza of four lines, which contain eight and six syllables alternately.</span>
