We owe a lot to vitamin C. Wards off colds and flu. Correct the sentence fragment. A. We owe a lot to vitamin C, wards off colds and flu. B. We owe a lot to vitamin C. It wards off colds and flu. C. We owe a lot to vitamin C, for wards off colds and flu. D. We owe a lot to vitamin C. Which wards off colds and flu.