Answer:
D) Markets allocate goods effectively.
Step-by-step explanation:
The two main principles of capitalism are that individuals are rational and act according to their best self interest, and markets will allocate goods and service more efficiently than governments.
In this case, the stores ran out of batteries and flashlights due to a sudden increase in the demand, but since the stores make a profit by selling batteries and flashlights, they immediately replenished their stocks and were able to satisfy all the customers' needs.
If the stores would have needed government permission for replenishing their inventories, they would have never done it so fast and so efficiently.