Answer:
b. both the price and quantity of wine sold to increase
Step-by-step explanation:
In the context, it is given that the price of the wine will increase in a drastic manner as announced by an advertisement the next month. So, this month we could expect an increase in the price as well as the quantity of the wine that is being sold.
As per market policy, when the demand of an item increases, both the price as well as the quantity sold will increase. Accordingly, this month the demand of wine would increase as from next month the price of wine would much much more than this month. SO this month people would buy more wine.