A leopard starts from rest at t = 0 and runs in a straight line with a constant acceleration until t = 3.0 s. The distance covered by the leopard between t = 1.0 s and t = 2.0 s is the 

(a)  Same as the distance covered during the first second.

(b) Twice the distance covered during the first second.

(c) Three times the distance covered during the first second.

(d) Four times the distance covered during the first second.