Answer:
c. Demand is received before the product is produced.
Explanation:
A "Pull System" is a manufacturing strategy being used by a company which allows it to see the problems when it comes to production. So, in this case, it tries to reduce the waste products by producing only the number of goods according to the actual demand.
Unlike the "Push System" which produces goods based on a forecasted demand, the Pull System produces only the goods that will meet the actual demand. This allows the company to avoid overproduction and produce goods of great quality.
So, this explains the answer.