Shooting foul at end of period

[Altor]

What I saw and heard from the stands, in order. This all happened bang, bang, bang, bang:

W44 grabs B23 on the arm as he begins his shot near the block. L blows his whistle. The buzzer sounds. B23 releases the shot which goes in the basket. Clock does not display tenths of a second.

Do you (a) count the goal and give B23 a FT with the lane cleared? (b) count the goal, use "definite knowledge" to put a second back on the clock and resume play with the FT? Or (c) waive off the goal and have B23 shoot two FTs with the lane empty?