Best Tool for Breaching a Cinder-Block Wall

Explanation:

To breach a hole in a cinder-block wall, the most effective tool is an all-purpose saw with a high-speed abrasive blade (option A). The high-speed abrasive blade is designed to cut through materials like concrete and cinder blocks efficiently. This type of blade typically has diamond or carbide particles embedded in it, which makes it effective for making clean and fast cuts.