Q 2117534489.     A line passes through the points `( 6,-7, - 1)` and `(2,- 3, 1)`.

The direction cosines of the line so that the angle made by

it with positive direction of `x`-axis is acute, are `........... .`

A

`-2/ 3,- 2/ 3, -1 / 3`

B

`-2/ 3,+ 2/ 3, -1 / 3`

C

`2/ 3,- 2/ 3, -1 / 3`

D

`- 2/ 3,- 2/ 3, +1 / 3`

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