Three Vectors , , and Add Together

Multiple Choice

Three vectors , , and add together to yield zero: + + = 0.The vectors and point in opposite directions and their magnitudes are related by the expression: A = 2C.Which one of the following conclusions is correct?

A) and have equal magnitudes and point in opposite directions.
B) and have equal magnitudes and point in the same direction.
C) and have equal magnitudes and point in opposite directions.
D) and point in the same direction, but
has twice the magnitude of
.
E) and point in the same direction, but
has twice the magnitude of
.