The correct answer is C. Replacement of goods with goods.
Barter is a system of exchange where goods or services are directly exchanged for other goods or services without using a medium of exchange, such as money. Barter is often used in small, isolated communities where there is no need for a medium of exchange. It can also be used in times of economic crisis when money is scarce.
A. Selling goods in cash is not barter, because cash is a medium of exchange.
B. Selling goods on credit is not barter, because credit is a form of payment that is deferred until a later date.
D. Selling the goods in installments is not barter, because installments are a form of payment that is made over time.