Read the run-on sentence.
Last fall, our charity had a walkathon we raised $2,000 for winter coats
What is the best way to revise the sentence?
O Last fall, our charity had a walkathon, we raised $2,000 for winter coats
O Last fall, our charity had a walkathon, and we raised $2,000 for winter coats.
O Last fall, our charity had a walkathon, raised $2,000 for winter coats.
O Last fall, our charity had a walkathon, and we raised $2,000 for winter coats.