The Magnitude of the Resultant Vector Obtained by Adding Any

The magnitude of the resultant vector obtained by adding any two vectors

A) is always at least as large as the magnitude of either vector.
B) is never larger than the simple arithmetic sum of the magnitudes of the two vectors.
C) is always the square root of the sum of the squares of the magnitudes of the two vectors.
D) may be positive or negative, depending on the directions of the two vectors.