Which sentence does not contain any errors in comma usage? A. Everything turned out for the best, after all. B. The dam moreover, was only three years old. C. In fact Los Angeles does have a public transportation system. D. People's houses generally speaking, have roofs.
A. Everything turned out for the best, after all. "Everything turned out for the best," is the main part of the sentence and" after all," is an addition to the main part.
