$$\text { If } \mathbf { A } \cdot \mathbf { B } = 0 \text {, and } | \mathbf { A } | \neq 0 , | \mathbf { B } | \neq 0 \text {, then }$$

Multiple Choice

$$\text { If } \mathbf { A } \cdot \mathbf { B } = 0 \text {, and } | \mathbf { A } | \neq 0 , | \mathbf { B } | \neq 0 \text {, then }$$

A) A is perpendicular to B.
B) A is parallel to B.
C) either of the first two answers may be correct, depending on details not supplied.
D) neither of the first two answers is correct.