Answer:
C. Both Tech A and Tech B
Step-by-step explanation:
Both Tech A and Tech B could be correct depending on the type of engine and the position of the engine in the vehicle.
In some cases, engines are mounted in the vehicle in such a way that they can only be removed from the top, such as in many front-wheel-drive vehicles where the engine is mounted transversely. In such cases, Tech A would be correct.
In other cases, engines are mounted in the vehicle in such a way that they can only be removed from the bottom, such as in some rear-wheel-drive vehicles where the engine is mounted longitudinally. In such cases, Tech B would be correct.
In some cases, engines may be mounted in the vehicle in such a way that they can be removed from either the top or the bottom. In such cases, both Tech A and Tech B would be correct.