In New York City, when he was the mayor Michael Bloomberg recommend that the city, with the help of private donors, make cash payments to poor and underprivileged parents who can certify that their children are attending school on a regular basis

The payments would start after third grade and go through high school, rising each year as dropout rates get higher and a child's forgone earning potential is higher. What economic concept does this policy represent?
A) public goods
B) incentives
C) externalities
D) technological progress
E) the "invisible hand"

B