Which of the Following Is the Best Illustration of Last

Which of the following is the best illustration of last clear chance?

A) Monica runs a drill press. She wears long-sleeved shirts and gets one sleeve caught on the drill bit. As a result, her arm is badly lacerated.
B) Tyra is a bank employee responsible for verifying check signatures against signature cards. She fails to verify the signature on one of Ben's checks, which had been stolen and bore his forged signature. The bank cashes the check and charges Ben's account.
C) Austin is a chemist. While mixing chemicals, he combines a rare potassium isotope with water, causing an explosion that destroys the laboratory.
D) Manny is a door-to-door salesperson. He approaches Jackson's house, which has a defective porch roof. Jackson was aware of this danger. Manny sees the roof sagging but continues onto the porch. The roof collapses, injuring Manny.