Parallel drive system

• A. Uses only the vehicle's internal combustion engine to drive the wheels.
• B. Uses the vehicle's ICE or electric motor to power the transmission to provide propulsion.
• C. Uses separate propulsion motors for each axle
• D. Is independent of the drivetrain

Answer: (B)

The key idea is that in a parallel drive system, propulsion can come from either power source and both are connected to the drivetrain to turn the wheels through the transmission. This means the transmission can be driven directly by the internal combustion engine or by the electric motor, and in many designs both can contribute at the same time. Saying that propulsion is provided by the ICE or electric motor to power the transmission correctly captures this setup: the drivetrain is shared between the two sources, rather than being isolated to one or driving each axle separately. The other descriptions don’t fit because they imply propulsion is limited to the engine only, or they describe a setup with separate motors for each axle or no direct link to the drivetrain, which aren’t defining features of a parallel drive system.