Final answer:
The correct answer is 2 x 6 inch strips.
Step-by-step explanation:
The correct answer is c) 2 x 6 inch strips.
Scrap matboard should be cut into 2 x 6 inch strips and used to protect frames from damage caused by hangers.
These strips can be placed between the frame and the wall, providing cushioning and preventing any scratches or marks on the frame.