Esteban, Mariko, and Greta Are the Only Three People in a Community

Multiple Choice

Esteban, Mariko, and Greta are the only three people in a community. Esteban is willing to pay $20 for the fifth unit of a public good; Mariko, $15; and Greta, $25. Government should produce the fifth unit of the public good if the marginal cost is less than or equal to

A) $25.
B) $15.
C) $60.
D) $20.