Answer:
B)A retiree buys 50 shares of stock at $10 a share and then sells the stock at a profit for $20 ashare.
Step-by-step explanation:
In economy an investiment is the purchase, production or use of goods today to generate wealth in the future. This means that in the present, the goods will not be consumed.
In this problem, the only option in which the goods are consumed today is the retiree which buys the stock and then resells it.
So the correct answer is:
B)A retiree buys 50 shares of stock at $10 a share and then sells the stock at a profit for $20 ashare.