The correct answer is D.
The clutch system is an integral part of the drivetrain, and it performs several key functions. The system, which includes the clutch, disc, flywheel, release bearing and release system, must work together flawlessly.

The correct answer is B.
The transmission is part of the driveline, but it is not considered part of the clutch system. The clutch system includes the clutch (sometimes called the pressure plate), disc, flywheel (may include pilot bearing or bushing), release bearing, and the release system (hydraulic, mechanical or cable).

The correct answer is A.
The diaphragm spring is a spring-steel disc compressed between the cover and pressure plate which, when pushed by the release bearing, engages and disengages the clutch.

The correct answer is C.
The disc is mounted to the input shaft between the flywheel and the clutch. It can slide forward and backward on the shaft, but cannot rotate without rotating the shaft.

The correct answer is D.
The disc is a critical component in providing long service life for the clutch system and performs several key functions: provides smooth engagement, dampens engine vibrations and helps filter out gear rattle.

The correct answer is A.
The pilot bearing or bushing is typically located in the end of the crankshaft. The pilot bearing supports the end of the transmission input shaft and centers the disc on the flywheel.

The correct answer is D.
The release bearing is attached to the fork and slides on a bearing retainer that is attached to the front of the transmission. The movement of the fork causes the release bearing to slide across the bearing retainer and press against the tips of the diaphragm spring fingers. Ball bearings in the release bearing enable it to turn while applying pressure to the fingers.

The correct answer is C.
The flywheel is bolted to the end of the crankshaft and transmits engine torque to the clutch.

The correct answer is D.
The dual-mass flywheel contains springs and torque-limiting devices, which enable it to absorb engine vibrations before they are transmitted to the driveline where they can cause gear rattle. When torque spikes occur, the torque limiter allows the primary section of the flywheel to turn independently of the secondary section, preventing damage to the driveline and transmission.

The correct answer is B.
The pilot bearing or bushing is typically located in the end of the crankshaft. The pilot bearing supports the end of the transmission input shaft and centers the disc on the flywheel.