Time left $0$:$58$:$51$

Which of the following is the largest form of electronic commerce?

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

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

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

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

The decline in unit costs of a product or service that occurs as the absolute volume of production increases is known as

a$.$ economies of scale.

b$.$ mass customization.

c$.$ specialization.

d$.$ None of the above.