Final answer:
The Cadillac mentioned in the statement was involved in a car crash and was completely crushed, making option c) the correct answer.
Step-by-step explanation:
The statement "My Cadillac was completely crushed in a car crash" indicates what happened to the vehicle. Based on the context given, the correct answer to the question is c) It was involved in a car crash and completely crushed. The statement directly says that the Cadillac was crushed as a result of a car crash, so options a), b), and d) are incorrect as they describe different situations that do not pertain to being involved in an accident and getting crushed.