The purpose of the watchdog role is to

The purpose of the watchdog role is to watch over the activities of a specifical part of the government and to report problems or illegal acts. It could be a person alone, a group or a committee. It also exists in private practice, as to avoid that a company acts wrong or against the laws and regulations.

b. parliament was weaker than the monarchy.

c, because the american revolution was from 1765 to 1783.