One Reason for the Good Record of Democracies on Economicgrowth

One reason for the good record of democracies on economicgrowth is that:

A) people can become rich by gaining economic resources in their favor.
B) people can become rich by competing for the limited economic resources.
C) the public as a whole can become rich by equally dividing the economic resources.
D) the public as a whole can become rich by supporting efficient policies that generate economic growth.(True Answer
) Correct