You Are Taking an Economics Class, as Part of Which

Multiple Choice

You are taking an economics class, as part of which you are studying the various types of e-commerce. ​
As part of your research, you have learned that vending machines in Japan allow shoppers to hold their cell phones in front of the machine in order to make a purchase using the smartphone. Which of the following types of commerce does this exemplify?

A) C2C
B) B2B
C) m-commerce
D) C2B