Which of the following is not an advantage of a price-based system? is actually economics on gradpoint

As you did not provide options here I managed to find your question and the answer would be that the prices can be easily set by the government is definitely not an advantage of a price-based system.
There are two ways the prices are set in the economic system:
1. They can be set by the government or
2. They can be freely set by the laws of supply and demand.