Warrants exercisable at $15 each to obtain 81000 shares of common stock were outstanding during a period when the average market price of the common stock was $20. Application of the treasury stock method for the assumed exercise of these warrants in computing diluted earnings per share will increase the weighted average number of outstanding shares by:_________

a. 20250.
b. 81000.
c. 27000.
d. 60750.