Which of the following statements is a true statement?

Question

A.
A vector can have positive or negative magnitudes.
B.
A vector's magnitude cannot be more than the magnitude of one of its components.
C.
If the x-component of a vector is smaller than its y-component then that vector is in the opposite direction to its y-component.
D.
The magnitude of a vector cannot be zero unless all of its components are zero.