Which of These Transactions Occurred in the Digital Marketspace

Which of these transactions occurred in the digital marketspace?

A) Becca sold Discovery Toys creative puzzles at an in-home demonstration.
B) Emiliano bought a brand new pair of TOMS 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 vendor when his 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.