I think it’s b vertically
One of the founders of Foursquare is Dennis Crowley. The other is Naveen Selvadurai. I know you didn't ask for both but I wanted to give them to you just in case. I hope this helps! (:
Answer: databases, electronic archives, online libraries, spreadsheets (B,C,E,F)
Explanation: I just took the test :)) hope u have a great day and remeber u are beautiful <3