Final answer:
The lever system that always gives a mechanical advantage but limited range of motion is the Second-Class Lever (B). In this system, the resistance arm is shorter than the effort arm, offering greater mechanical advantage.
Step-by-step explanation:
The type of lever system that always provides a mechanical advantage but not much range of motion is the Second-Class Lever. In second-class levers, the fulcrum is at one end, the effort is applied at the other end, and the load is situated between them. This arrangement offers a mechanical advantage because the resistance arm is shorter than the effort arm. Common examples include wheelbarrows and nutcrackers. Contrarily, a third-class lever, where the effort is applied between the fulcrum and the load, does not provide this mechanical advantage but increases the motion range instead. Therefore, the correct answer to the student's question is option B. Second-Class Lever.