A particle moving along a straight line according to the law , where x is its position measured from a fixed point on the line and t is the time elapsed till it reaches position x after starting from the fixed point. Here A, B and C are positive constants.
(A) Its velocity at t=0 is A
(B) Its acceleration at t=0 is B
(C) Its velocity at t=0 is B
(D) Its acceleration at t=0 is C
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