Answer:
The correct answer is letter "B": Beekeepers are paid for the pollination services their bees provide, thus internalizing the externality.
Explanation:
Internalizing the externality refers to transferring the obligation (costs) from a negative externality -pollution or congestion in traffic, for instance- from outside to inside. This can be achieved by imposing taxes, property rights, tolls, and subsidies from the state.