Which sentence does not contain any errors in comma usage? A. The writer writes mysteries and thrillers and then she publishes them under a false name. B. The sky looks bright today but, it is supposed to rain this afternoon. C. Several shoppers bought milk, and others bought bottled water. D. Todd watched the movie by himself, but, later on he went bowling with his friends.
A contains an error: "and then she publishes them under a false name" is an independent clause and should have a comma before it. B contains an error, as the comma should be before "but", not after it, for the same reason as A. C correctly shows what should have been done in A and B. D should not have a comma after "but".
