An investor writes a covered call by buying one share of a stock at $50 and selling a European call option on the stock with strike price $55 at $1.25. What is his profit if he holds his position until maturity of the option and the stock price is $45 then?
A. -$6.25
B. -$3.75
C. -$1.25
D. $1.25
E. $3.75