Which best describes what occurs in the product market?

If this question has the same choices with the previous ones, the answer is letter c. the exchange of goods and services for money.
In the product market, exchange of goods and services happens.

Choices to this question are:
a)the exchange of labor for capital

b)the exchange of goods and services for factors of production

c)the exchange of goods and services for money

d)the exchange of money for factors of production

Clean air provides nitrogen