Read the following lines from Act I, Scene 7 of Macbeth. Then, answer the question that follows.

MACBETH
Away and mock time with fairest show:
false face must hide what the false heart doth know.

Which theme is best reflected in these lines?

A Ambition, unchecked, can lead to corruption.
B Darkness is dangerous.
C Things are not always what they seem.
D Those without convictions are easily manipulated.