Trade
a) only emerged in about 1,000 b. c.
b) only emerged once markets became established.
c) has been a feature of nearly all economies.
d) only came into existence when markets developed.
e) none of the above.

C) Has been a feature of nearly all economies.

Explanation:

A trade is an of various goods. It is the transfer of services and goods from one party in exchange of money from the other party. It is the act of selling or buying goods. As per the economist, it is set of network which allows trade to be considered as a market. It is a characteristics of all the economies around the world.

Hence the correct option is --- (C).

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )