The driver of the small car caused the accident. He was ______.

• A. At fault
• B. To blame
• C. Guilty
• D. Responsible

Answer: (A)

The main idea here is choosing the natural way to describe who caused an accident. “At fault” is the standard expression for being responsible for an accident or error. It fits smoothly with the idea that the driver’s action led to the crash, so saying he was at fault communicates responsibility clearly and concisely.

Other options edge into different nuances. “To blame” would require something like “to blame for the accident” to sound natural, and it’s a bit more formal or judgmental. “Guilty” suggests legal guilt, which isn’t always appropriate for everyday traffic incidents. “Responsible” is okay, but it usually needs a follow-up like “for the accident” to be perfectly clear, and the more common, compact way to state this situation is “at fault.”