Question

how can employers ensure workers use fall protection properly?
by observing workers at the jobsite after training is completed
by letting workers decide how to use it
by providing written instructions without in - person training
by trusting workers will use it properly

Explanation:

To ensure workers use fall protection properly, employers need a method that verifies correct usage. Letting workers decide (second option) or just trusting them (fourth option) is not reliable. Providing only written instructions without in - person training (third option) may not be sufficient as workers might not understand how to apply the instructions in practice. Observing workers at the jobsite after training (first option) allows employers to check if workers are using the fall protection as trained, which is a practical way to ensure proper usage.

Answer:

A. By observing workers at the jobsite after training is completed