Oil companies such as British Petroleum and Royal Dutch Shell sell gasoline through their own branded gas stations. In some cases, these companies own their gas stations; in others, the stations are owned by local franchises. How might the following factors affect the choice of corporate versus local ownership?

(a) The gas station also does a lot of automotive repairs.

(b) The gas station is located on an interstate highway.

(c) The gas station has a large convenience store.