How Can Asking Which Rules Have the Best Consequences Lead

Multiple Choice

How can asking which rules have the best consequences lead to different moral conclusions than asking which actions have the best consequences?

A) Because rules help people decide what to do when it's unclear what actions will have the best consequences, thereby helping them avoid mistakes.
B) Because rules can change people's incentives and expectations, thereby changing their behavior.
C) Both (a) and (b) .
D) Neither (a) nor (b) .