An Extra Flaky Bottom Crust Can Be Obtained by

An extra flaky bottom crust can be obtained by

A) pricking the pie dough with a fork.
B) weighing the pie dough down with beans, which are removed a few minutes before the baking is completed.
C) covering the bottom of the crust with aluminum foil.
D) placing a cookie sheet on the rack prior to heating the oven and then placing the pie crust atop of it for baking.