Hoisting operations should be stopped in severe weather such as heavy rain, fog, heavy snow, and wind speeds reaching ( ) or above.

Answer: D

Hoisting operations should be stopped in severe weather such as heavy rain, fog, snow, and wind speeds reaching 12.0m/s and above. When carrying out hoisting operations after rain or snow, the ice and snow should be cleared away in time, and anti-slip and anti-leakage measures should be taken. Test hoisting first and confirm that the brakes are sensitive and reliable before proceeding with the operation.