Answer:
:A. Demand increases
Step-by-step explanation:
Soccer and football are two distinct field games. In this question, they have been presented as substitutes goods. Consumers view substitute goods as similar and comparable. Consumption of either one of them results in equal satisfaction to the customer.
An increase in demand for one substitute product results in a decline in demand for the other. The demand for a substitute good may increase if customers prefer it over the others due to various reasons. Should customers change their preference to football, the demand for football will increase while that of soccer decreases.