I need to know which one is the right choice?

Which of the following statements is consistent with Charles Tiebout's concept of competition by individuals voting with their feet?

a- Individuals move to the community that provides them with the desired level of public goods.

b-Individuals do not understand what public goods are offered in a town until they move there and try it out.

c- Individuals are herd-like and prefer the same level of public goods as their neighbors.

d-Individuals elect the politicians that promise to provide them with the desired level of public goods.