What is the most logical next event?

After thirty five seconds, he pulls the blind fold down over his eyes and continues to try and solve the cube. a minute and fifteen seconds

[a]. pass by before he removes the blind fold from the cube.
[b]. has passed and the boy puts the cube down and the timer stops.
[c]. pass before he does it again.
[d]. later, he stops and announces that he solved it and starts punching the machine.
[b].