Select the best statement.

A. The parallelogram rule for adding vectors only works if at least one of the vectors is in first quadrant.
B. The parallelogram rule for adding vectors only works with vectors in the first quadrant.
C. The parallelogram rule for adding vectors in a Euclidean space always works.
D. The parallelogram rule for adding vectors is a visualization technique unsuited for computation.
E. none of the above