Determine whether each of the following policy interventions is designed to increase supply or decrease demand for a public good or common resource.a. A city government increases the frequency of street sweeping.b. London begins charging a toll to all vehicles that drive within the city limits.c. A gated community passes a bylaw requiring all homeowners to mow their lawns once a week during the summer.d. The National Park Service increases the cost of a pass to enter the Everglades.