Answer:
This car's seats are more comfortable than the trucks.
Step-by-step explanation:
Option
According to Grammar rule , comparison should be made for things which are similar.
If two things of different type are compared, then its faulty/illogical comparison.
In option C Car's seat is being compared with truck while it should have been compared with truck's seat. Hence correct sentence should have been
This car's seats are more comfortable than the trucks's seat.