BarnesandNoble.com is an example of electronic commerce.

A$.$ business$-$to$-$consumer $($B$2$C$)$

B$.$ business$-$to$-$business $($B$2$B$)$

C$.$ government$-$to$-$consumer $($G$2$C$)$

D$.$ consumer$-$to$-$consumer $($C$2$C$)$

E$.$ government$-$to$-$business $($G$2$B$)$