When should the building be used to anchor the butt during a ladder raise?

The correct answer reflects a specific situation that enhances the safety and effectiveness of ladder operations. When a single firefighter raises an extension ladder, utilizing the building as an anchor for the butt of the ladder provides stability. This is particularly important because it minimizes the risk of the ladder slipping or falling over during the raising process, ensuring that the ladder is properly positioned against the wall before it is extended.

In scenarios where the ladder might be raised without this anchoring technique, the potential for instability increases, especially when only one firefighter is involved. By using the building as an anchor, the firefighter can establish a more secure footing and focus on extending the ladder to the desired height without compromising safety.

While the other options address different ladder configurations or scenarios, they do not capture the specific advantage of having the building as an anchor during a single firefighter's ladder raise, which directly contributes to a safer operation.