If veca=2hati+2hatj+2hatk and vecb=2hati...

If `veca=2hati+2hatj+2hatk` and `vecb=2hati+hatj+2hatk` then the unit vector in the direction of `veca-vecb` is:

A

`hati`

B

`hatk`

C

`hatj`

D

`6hatk`

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