There are $6$ e$-$commerce models. Match the model to the example:

$$ Fiverr

IBM Cloud for Government

Alibaba

Facebook Marketplace

$$ Internal Revenue Service

Business$-$to$-$Business $($B$2$B$)$

Business$-$to$-$Consumer $($B$2$C$)$

Consumer$-$to$-$Consumer $($C$2$C$)$

Consumer$-$to$-$Business $($C$2$B$)$

Business$-$to$-$Administration $($B$2$A$)$

Consumer$-$to$-$Administration $($C$2$A$)$

Warby Parker