Asubset of e-commerce that uses social networks to assist in marketing and purchasing products is known as commerce. select one: a. friend b. crowd c. source d. social

The correct option is: D. Social commerce

Explanation:

E-commerce or electronic commerce is the process of purchasing and selling various products, transferring information and funds with the use of an electronic network or internet.  

Social commerce is a subgroup of electronic commerce, that involves the use of social networks, social media sites or online media to assist online purchasing, selling and marketing of products and services.

there is an explationation of this on a site called crash   course world history 1

answer; i believe the correct answer is (8) eight.