how might each of the following be interpreted as an example of rent provision by government?

A) State Laws require than out-of-state big-game hunters be accompanied by one of a limited number of liscensed in-state hunting guides.

B) An increase in the minimum wage increases the likelihood that firms will hire skilled unionized labor rather than unskilled labor.

C) A state law require that graduates of dental schools pass a stringent examination, established by a panel of dentists, in order to practice dentistry.