The correct answer is B - he will not be defeated until the Birnam wood marches to his castle. "Be lion-mettled, proud, and take no care who chafes, who frets...until great Birnam Wood to high Dunsinane Hill/Shall come against him".
It's not B. It doesn't have quotation marks.
Not C because the first word in the quotations needs to be capitalized.
Not D because the quotation need to surround the statement.
So your answer is A :)
Hope this helped :)