C2C - Consumers sell to each other at popular auction and list sites such as eBay and craigslist

Question

C2C
A)    Consumers sell to each other at popular auction and list sites such as eBay and craigslist.+
B)    Businesses sell goods and services to other businessesor to the government.
C)    is an advertisementembedded at the top of a Web page.
D)    the number of times that site visitors click the ad to connect to theadvertiser’s site.
E)    (technically an HTTP cookie) is a smallchunk of data generated by a Web server and stored in a text file on yourcomputer’s hard disk.