Answer: B. The price went up because the supply was low and the demand was high,
Step-by-step explanation:
Based on the information given in the question, when there is a reduction in the supply of a particular good, the effect it has on the price is that there'll be a rise in the price of such good.
In this case, since there is a reduction in the supply of the good as a result of the fact that all the stores have sold out their stock, and it was been resold by some of the people that purchased it earlier, there'll be an increase in the price of the doll since the demand is more than the supply. This will breathe scarcity and increase price.
Therefore, the correct option is B