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

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