In a command economy, how are the prices of goods and services determined?
a) business owners
b) the central government
c) market forces of supply and demand
d) independent agencies and independent regulators
answer !

B

Explanation: In a command economy, decisions about the economy are made by the central government.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

saving account is right