The price of a stock is $67. A trader sells 5 call options contracts on the stock with a strike price of $64 when the option price is $4. The options are exercised when the stock price is $65. What is the traders net profit or loss? Each contract represents 100 shares.

A. Loss of $1,500

B. Loss of $500

C. Gain of $1,500

D. Loss of $1,000