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

How to make jam thumbprint cookies
Preheat the oven to 350 f (177 c).
Sift the flour.
Sieve the self-raising flour into a large bowl.

Select from:
a). Add the butter or margarine. Get your butter or margarine and break it up into pieces..
b). Roll out a sheet of parchment paper using a rolling pin. Mix all the pieces of parchment paper together with a rolling pin until you have formed about of a soccer ball..
c). Wet the fingers of one hand and vigorously scrub the thumb and forefinger with the raw egg or yolk. Use the other hand to wash the hands or put away the scrub..
d). To make sure that the flour sift all the way in, let it sit for 1 minute. Then scoop some lumps out of the flour..
a).