This is a test of commonsense with single/multi-choices. Complete the next sentence:

Then he uses his hands to remove the axle out. He uses another tool to unscrew a washer out of the axle. then he

Options are:
a). starts to new the tire.
b). takes a spool from the basket and ties the nut back into place.
c). uses a hose to clamp the nut back in place.
d). uses a tool with a magnetic end to remove tiny metal particles out of the axle.
The answer is:
d).