Which of the Following Transactions Occurred in the Marketspace

Which of the following transactions occurred in the marketspace?

A) Connie sold Discovery Toys creative puzzles at an in-home demonstration.
B) Joan bought a brand new pair of Dansko shoes through Zappos.com.
C) Shelby purchased an iPhone case at a kiosk at the airport.
D) Corey bought a double-dipped chocolate ice cream cone from the ice cream person when his mobile ice cream truck came down the street.
E) Josh bought his mother a menorah through the Source for Everything Jewish gift catalog by calling a toll-free telephone number.