Answer:
Option B.
Step-by-step explanation:
Decrease, is the right answer.
In the context of economics, Demand is a principle which refers to the desire of a consumer to buy goods or services and his willingness to spend a price for a particular good or service. There are a number of factors that determines a shift in the demand, for instance, the tastes and preferences of the buyers, the level of income of consumers and the changes in the prices of related goods etc. If there are unfavourable shifts in the constituents affecting demand, it will commence to the decrease in demand which will cause a leftward shift in the demand curve.