If |z|/w = 2, which of the following must be true?
Choose the correct choice from the following choices:	A) z = -2w	B) z = 2w	C) z^2 = 4w^2	D) z^2 = 4w^3	E) z^3 = 8w^3
|z|/w = 2.   |z| = 2w.   Then z = 2w or -2w and so z^2 = 4w^2.   The answer is z^2 = 4w^2.
<result>C</result>
If |z|/w = 2, which of the following must be true?