Concept:Commerce is based on exchange, and exchange becomes necessary when people specialise in production and create surplus goods.
Explanation:In early society, people produced only what they needed for themselves.
When specialisation began, each person produced a particular good or service.
Specialisation increased output and created a surplus of goods.
This surplus could not be fully consumed, so people started exchanging the extra goods for other things they needed.
Regular exchange led to trade, and trade became the foundation of commerce.
Transportation and warehousing are aids to commerce, not its main promoter.
Manufacturing alone, without a reason to exchange, would not necessarily develop commerce.
Therefore, specialisation promoted the development of commerce.
Answer:C. specialization