The answer would be A. This is because the answer takes the information from the question and molds it into a statement. The other answers add unknown information to the statement, which makes it more confusing and unrelated to the actual claim.
During the events of Scene IV, Duncan announces that his successor will be his own son, Malcolm. This obviously angers Macbeth because he thought the next king would be him, as prophesied by the three witches. This is the moment when he decides for certain that he has to kill Duncan if he wants to take the throne for himself. He concocted a plan along with his wife, and together they murdered the king.
All vaccinations must be current and the applicant must have negative skin tests for tuberculosis.
The part where you cannot stop reading
OH MY GOD! part.
Like for example for three little pigs, the complex would be the wolf blowing the third pig's house.