The driver of a truck slams on the brakes when he sees a tree blocking the road.The truck slows down uniformly with an acceleration of 5.60ms^-2 for 4.20 s,making skid marks 62.4 m long that end at the tree.With what speed does the truck then strike the tree?

A 3.35ms^-1

B 3.26ms^-1

C 3.10ms^-1