Question

... is an economic system where consumers can choose what to buy and where to buy

A. Planned economic system
B. Mixed economic system
C. Market economic system
D. Tradition economic system ​

Answer 1

it is C. Market Economic system!

as I read and knew once I found of by reading the sentence you put.

to check out more and I give credits also too for the information https://flexbooks.ck12.org

for confirming it for me. and you can find out more about Economic Systems there for sure also !!