Refer to the exhibit. Which is the best way for PC A and PC B to successfully communicate with sites on the Internet?
Configure a default route from R1 to ISP and a static route from ISP to R1.*
Configure a static route from R1 to ISP and a dynamic route from ISP to R1.
Configure a routing protocol between R1 and ISP and advertise all the routes.
Configure a dynamic route from R1 to ISP and a static route from ISP to R1.