question 20 (1 point)\nfor safetys sake, industrial screwdriver blades are made of \no a tempered steel\no b…

Brief Explanations:

Tempered steel is commonly used for industrial screwdriver blades due to its strength and durability, which are important for safety - related reasons. Torx is a type of screw - head design, not a material. Clutch - drive is a feature related to screwdriver operation, not a material. Fiberglass is not a suitable material for screwdriver blades as it lacks the necessary hardness and strength.

Answer:

A. tempered steel