Suppose a quantilty x can be dimensionally represented in terms of M,L and T, that is `[x], M^aL^bT^c`. The quantity mass

A. can always be dimensionally represented in terms of L, T and x

B. can never be dimensionally represented in terms of L, T and x.

C. May be represented in terms of L, T and x if `a!=0`

D. does not exist