The correct answer is B) distortion and compression. Mooring tension gauges typically use load cells that measure the distortion or compression of the mooring line to determine the tension. Distortion-based load cells measure the change in length or shape of the mooring line, while compression-based load cells measure the force applied to the line. These two types of load cells are commonly used in mooring tension gauges, as they provide an accurate and reliable way to monitor the forces acting on the mooring system. The other options are incorrect because they do not accurately describe the types of load cells used in mooring tension gauges. Hydraulic and mechanical load cells are not the primary types used, nor are magnetic or applied torque load cells typically employed for this application.