when using casing nails to install a window, what tool should be used to drive the head of the nail below…

when using casing nails to install a window, what tool should be used to drive the head of the nail below the surface without denting the frame?\na. jab saw\nb. casing tool\nc. plumb bob\nd. nail set
Answer
Brief Explanations:
A nail set is a tool specifically designed to drive the head of a nail below the surface of the material (such as wood in window - frame installation) without denting the frame. A jab saw is used for cutting, a casing tool is not a standard tool for this nail - setting purpose, and a plumb bob is used for determining vertical alignment.
Answer:
D. Nail set