Answer:
C. ticket sales for the new coaster.
Explanation:
In the case when the sales is reduced for the boat rise so the new rise would decrease the sales of the boat ride.
in the case when the food cost would be increase so if the sales of the food rises so automatically the food cost would rise
In the case when there is an extra sales for existing coaster, the same is mentioned in the given case
Therefore the option c is correct