Final answer:
Workers lost their lives while setting gunpowder into the cliffs due to factors like the wind, short time frame, and communication issues. Option B is the correct answer.
Step-by-step explanation:
Many workers lost their lives while setting gunpowder into the cliffs due to a combination of factors. The wind sometimes blew the workers too close to the lighted fuse, putting them at risk of explosions. Additionally, the workers had only a short time between lighting the fuse and getting to the cliff top, which increased the chances of accidents. Furthermore, the men up above did not always see the hand signals of the workers, leading to miscommunication and potential dangers.