A particle moves on the x-axis in such a way that its position at time t is given by x(t)=3t

^{5}- 25t^{3}+60t.^{ }For what values of t is the particle moving to the left?

A) -2<t<1 only

B) -2<t<1 and 1<t<2

C) -1<t<1 and t>2

D) 1<t<2 only

E) t<-2, -1<t<1, and t>2

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