Please, explain the correct answer.

The current price of a non-dividend-paying stock is $40. Over the next year it is expected to rise to $42 or fall to $37. An investor sells put options with a strike price of $41. Which of the following is necessary to hedge the position? Buy 0.2 shares for each option purchased Short sell 0.2 shares for each option purchased Buy 0.8 shares for each option purchased Short sell 0.8 shares for each option purchased None of the above