Question: If A and B are nonzero vectors for which AB = 0, it must follow that A) AB = 0. B) A is parallel to

If A and B are nonzero vectors for which A·B = 0, it must follow that 

A) A×B = 0. 

B) A is parallel to B . 

C) |A ×B | = AB. 

D) | A×B| = 1.

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