Question

Read the following short passages either aloud or to yourself. Each sentence contains a sentence fragment, a run-on, or a comma splice. Find the error and then type it correctly: On our drive into the city, we came across an accident. Which had closed three of the four lanes of traffic. it added an extra hour to our trip.
I'm not sure if my answer is correct or not.

On our drive to the city, we came across an accident which had closed three of the four lanes of traffic. Because of the accident, an extra hour was added to our trip.

Answer 1

On our drive into the city, we came across an accident. Which had closed three of the four lanes of traffic. It added an extra hour to our trip.

The passage should be corrected to be proper sentences.

On our drive to the city, we came across an accident which had closed three of the four lanes of traffic. Because of the accident, an extra hour was added to our trip.

Your answer is completely fine. It sounds great.