Which sentence from the passage includes a coordinating conjunction? a. “Researchers' estimates of the actual number vary from three hundred to six thousand, but everyone knows that ads are everywhere.” (paragraph 1) b. “Advertising goes down the street with us; it's on trains, planes, and buses.” (paragraph 1) c. “It shouts at us at sporting events from the banners on display and the electronic scoreboards.” (paragraph 1) d. “That's about how many advertisements you are exposed to in one day if you live in a metropolitan area.” (paragraph 1)