Tickets to a Combined Amusement Park and Water Slide Were

Tickets to a combined amusement park and water slide were $49 for the day.Then the company gave customers the option to purchase tickets for either the amusement park or the water slide for $18.To help keep costs in line,the park management also began charging its customers a small parking fee.Initially,the cost of parking was figured into the $49 price.The amusement park is using:

A) price lining.
B) potential (or base) pricing.
C) Unbundling.
D) professional services pricing.
E) price maintenance.