Tournaments Are Useful for Rewarding Worker Effortwhenever

Tournaments are useful for rewarding worker effortwhenever:

A) external factors, such as the quality of the good and the state of the economy, have little effect on workers'
Success.
B) workers are myopic and unaware that external factors play a significant role on sales.
C) workers are utility maximizers primarily concerned about their reputation in the community.
D) external factors, such as the quality of the good and the state of the economy, do affect workers
Success.