A line makes angles \( \alpha, \beta, \gamma, \delta \) with the four diagonals of a cube then \...

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A line makes angles \( \alpha, \beta, \gamma, \delta \) with the four diagonals of a cube then \( \cos ^{2} \alpha+\cos ^{2} \beta+\cos ^{2} \gamma+\cos ^{2} \delta= \)
P
(A) 1
(B) \( 4 / 3 \)
(C) 3/4
(D) \( 4 / 5 \)
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