How does the command economy of Cuba answer the three basic economic questions (what to produce, how to produce and for whom to produce)?

A.
The past guides all decisions about how to answer the basic economic questions.

B.
Supply and demand will determine how all the basic economic questions are answered.

C.
Supply and demand will answer the basic economic questions, but government will make changes to guarantee fairness and productivity.

D.
The government makes all the decisions about answering the basic economic questions.