Answer:
B. An inelastic demand
Step-by-step explanation:
Demand is said to be inelastic if a larger change in price leads to a small or slight change in the quantity of goods demanded.
For example: If a 30% fall in price brings about less than 30% or no rise at all in demand, it is said to be inelastic demand.
Therefore in the case of San Francisco 49ers, their tickets have an inelastic demand because a 15% fall in price of the tickets brings about only 10% increase in the demand for their ticket which is lesser than the percentage of fall in the price of the tickets.