In the Former Soviet Union, Producers Were Paid for Meeting

In the former Soviet Union, producers were paid for meeting output targets, not for selling products. Under those circumstances, what were the economic incentives for producers?

A) to produce good quality products so that society benefits from the resources used
B) to conserve on costs, so as to maintain efficiency in the economy
C) to produce enough to meet the output target, without regard for quality or cost
D) to produce those products that society desires most