Betsy Loves to Garden, and Her Rose Garden Is Enjoyed

Betsy loves to garden, and her rose garden is enjoyed by everyone in her neighborhood.Because her consumption of rosebushes provides a positive externality to the community, the government should:

A) provide gardeners like Betsy a subsidy because the market quantity of rosebushes is greater than the socially optimal quantity.
B) impose a tax on gardeners like Betsy because the market quantity of rosebushes is lower than the socially optimal quantity.
C) provide gardeners like Betsy a subsidy because the market quantity of rosebushes is lower than the socially optimal quantity.
D) impose a tax on gardeners like Betsy because the market quantity of rosebushes is greater than the socially optimal quantity.