4.The following information pertains to J Company's outstanding stock for 2021:

Common stock, $1 par
Shares outstanding, 1/1/2021	10,000
2 for 1 stock split, 4/1/2021	10,000
Shares issued, 7/1/2021	5,000
Preferred stock, $100 par, 7% cumulative
Shares outstanding, 1/1/2021	4,000

What is the number of shares J should use to calculate 2021 basic earnings per share?

A. 20,000.

B. 22,500.

C. 25,000.

D. 27,000.