nfhs test

[rails42]

I need some help with #51 With R1 at third and R3 at first,R3 takes several hard steps in what turns out to be a bluff to steal second.In the set position
F1,without simulating a pitch,wheels and steps toward and feints a throw to second while R3 is taking his steps to second.U1 will call
A.A legal move in the given circumstance
B.A balk,both runners awarded one base
C.A balk,As F1 did not step back legally from the pitching plate before he made the feint
D.The move is legal only if R3 actually attempted to steal second