Vectors $$\overrightarrow { \mathrm { A } }$$ And $$\vec { B }$$

Multiple Choice

Vectors $$\overrightarrow { \mathrm { A } }$$ and $$\vec { B }$$ have equal magnitudes.Which statement is always true?

A) $$\overrightarrow { \mathbf { A } } + \overrightarrow { \mathbf { B } } = 0$$ .
B) $$\overrightarrow { \mathbf { A } } - \overrightarrow { \mathbf { B } } = 0$$ .
C) $\overrightarrow { \mathbf { A } } - \overrightarrow { \mathbf { B } }$ is perpendicular to $\overrightarrow { \mathrm { A } } + \overrightarrow { \mathrm { B } }$ .
D) $\overrightarrow { \mathrm { B } } - \overrightarrow { \mathrm { A } }$ is perpendicular to $\overrightarrow { \mathbf { A } } - \overrightarrow { \mathbf { B } }$ .
E) The magnitude of $\overrightarrow { \mathbf { A } } - \overrightarrow { \mathbf { B } }$ equals the magnitude of $\overrightarrow { \mathrm { A } } + \overrightarrow { \mathrm { B } }$ .