Which sentence uses commas correctly? a. in every city, on our tour, we bought special souvenirs. < picked a b. in every city, on our tour we bought special souvenirs. c. in every city on our tour we bought special souvenirs. d. in every city on our tour, we bought special souvenirs.

D. because there is a prepositional phrase before the comma. If you take out the phrase, you have "we bought special souvenirs." It is a complete sentence, but "in every city on our tour" that is not a complete sentence and can't stand on its own. Therefore, it has to have a comma in between the two.

Are we supposed to be writing it for you

In my opinión this is the first person