The answer is B: Histories.
The works of Shakespeare are grouped in three categories: comedies, tragedies, and histories.
Antony and Cleopatra, one of Shakespeare´s Roman histories, tells the story of Mark Antony, one of the three triumvirs of the Roman Republic —the other two being Lepidus and Octavius, the latter one being Antony´s main antagonist in the play— and Cleopatra, Queen of Egypt. In the story, Antony falls in love with Cleopatra and neglects his responsibilities towards the Roman Republic; this in turn sets forth Octavius´ animosity and, eventually, their clash, Antony´s defeat and Cleopatra´s suicide.