This type of pulley multiples the force being usedAmoveable pulleyBfixed pulleyCblock and tackle

The type of pulley that multiplies the force being used is C. Block and Tackle.

Here's why:

A. Moveable Pulley: A moveable pulley is a pulley that moves with the load. The moveable pulley allows the effort to be less than the weight of the load. The load is lifted as the effort is pulled down. However, it does not multiply the force.

B. Fixed Pulley: A fixed pulley is a pulley that stays in one place. The effort is equal to the load. It changes the direction of the force but does not multiply it.

C. Block and Tackle: A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift or pull heavy loads. This system does multiply the force being used, making it easier to lift or move the load. Therefore, the correct answer is C. Block and Tackle.