Jack Pickle decided to start a small business as a corporation. His initial investment was $4,000 cash in exchange for common stock. Demonstrate how to record this transaction in the accounting equation.

a. Decrease Cash by $4,000; decrease Common Stock by $4,000.
b. Increase Cash by $4,000; increase Revenues by $4,000.
c. Increase Cash by $4,000; decrease Common Stock by $4,000.
d. Increase Cash by $4,000; Increase Common Stock by $4,000.