A capital asset includes which of the following?
I. Real estate held as an investment in rental property.
II. The copyright to a song held by its writer.
III. Real estate used in a trade or business.
IV. accounts receivable.

a. Only statement I is correct.
b. Statements I and II are correct.
c. Statements III and IV are correct.
d. Statements I, II, and III are correct.
e. Statements I, II, III, and IV are correct.