Which of the following is not part of US GNP?

a.The wages earned by a US national from working at Coffee Bean

b.The net rent earned by a US national from renting one of his properties in Canada

c.The wages paid by the University of California to one of his professors, who is a national of the United Kingdom

d.None of the above/below

e.The net profits made by a US national from his start-up company located in Riverside