Which of these characteristics best describes a communist economy?

D: production planning is done by gov. agencies

is your best answer.

Within the Communist economy, the government tells people what type of job to do, how much people inside the workforce, input and output rates, as well as the amount of time worked, how much they pay the workers, etc. Within the Communist government, it is "everything is shared by the people, [and all power is in the hands of the dictator and government]"

hope this helps

Acase involving the laws of a single state.