Final answer:
The crumb crust is best suited for pumpkin pie because its firm texture contrasts well with the custardy filling. It's not ideal for apple or two-crust pies, which usually require a regular pastry crust.
Step-by-step explanation:
A crumb crust is best suited for custardy or chilled pies such as pumpkin pies, cheesecakes, or mousse pies. It's created from crushed cookies or graham crackers mixed with butter and pressed into a pie dish. This type of crust is not typically used for fruit pies like apples or for pies that require a top crust, such as your traditional two-crust pie. Therefore, the correct answer is C) Pumpkin. The firm, yet crumbly texture of a crumb crust creates a pleasing contrast with the smooth, rich filling of a pumpkin pie.