what is never to be engaged when using power tools?\no booster\no trigger lock\no bit shank

what is never to be engaged when using power tools?\no booster\no trigger lock\no bit shank
Answer
Brief Explanations:
When using power - tools, a booster is not something that should be engaged as it is not a standard or safe component to interact with during normal power - tool operation. A trigger lock is a safety feature that can be used to prevent accidental firing, and a bit shank is part of the tool bit that fits into the tool.
Answer:
A. booster