If `overset(to)(a) =hat(i) - hat(k) , overset(to)(b) = x hat(i) + hat(j) + (1-x) hat(k)` and
`overset(to)(c ) =y hat(i) +x hat(j) + (1+x-y) hat(k) . "Then " [overset(to)(a) , overset(to)(b) , overset(to)( c) ]` depends on

Options

A. (a) only x
B. (b) only y
C. (c) neither x nor y
D. (d) both x and y

Answer

C