The correct answer is: A. Dubbing
Dubbing is the process of making the background rough, before plastering. It is done by using a hammer and a chisel to create small holes in the surface of the wall. This helps the plaster to adhere to the wall and prevents it from cracking.
Hacking is the process of removing large pieces of plaster from a wall. It is done by using a hammer and a chisel to break up the plaster into smaller pieces. This is done to prepare the wall for a new coat of plaster.
Blistering is a condition that occurs when plaster is applied to a wall that is not properly prepared. It is caused by moisture trapped between the plaster and the wall. This can cause the plaster to bubble and peel away from the wall.
Peeling is a condition that occurs when plaster is applied to a wall that is not properly prepared. It is caused by the plaster not adhering to the wall properly. This can cause the plaster to flake and peel away from the wall.