TechCo., a company based in Silicon Valley, California, files a lawsuit against its next-door neighbor claiming they violated the U.S. Patent Act. The court has subject matter jurisdiction because:

I. Diversity of citizenship exists.

II. The case involves a federal question.

III. The United States is a party in the case.

IV. The amount in controversy is more than $75,000.

a. I only

b. II only

c. II and III

d. I and IV

e. IV only