Multi-choice problem: Continue writing the next sentence in this paragraph:

How to make apple pie in an apple
Preheat the oven to 350f/180c.
Pat dry with paper towels. Set on a cutting board.
Wash the apples well under cold water.

Available options: a). Cut them in half, lengthwise, if desired. Peel and cut half of the apples. b). Put them in a bowl, freeze in 4 minutes, till hard but mushy. Slice in wedges and let cool on the sheet, or in the fridge for about 10 minutes. c). With a small sharp knife, carve out the core and seeds (without piercing the bottoms of the apples). Cut a lid into each apple and remove the tops. d). If using frozen apples, see the instructions for how to peel and mash these apples. Apples are generally diced into bite-sized chunks, so wash or mash any pieces first.
c).