[单选题]
On January 1, Orange Computers issued employee stock options for 400,000 shares. Options on 200,000 shares have an exercise price of $18, and options on the other 200,000 shares have an exercise price of $22. The year-end stock price was $24, and the average stock price over the year was $20. The change in the number of shares used to calculate diluted earnings per share for the year due to these options is closest to:
A.20,000 shares.
B.67,000 shares.
C.100,000 shares.