What happens next?

How to make chocolate cupcakes with peppermint frosting
Preheat oven to 350 f (175 c).
Combine the brown sugar and the butter in a large mixing bowl.
Beat with a mixer set at medium speed for two minutes or until well-blended.

Select from:
A). Put into fridge for about 20 minutes to chill and cool. Pour in the vanilla extract, lemon juice, and egg and stir until well blended.;
B). Add two tablespoons (22 g) of filling to the large mixing bowl. Mix in the batter with a mixer set at medium-high speed for 10 to 15 minutes or until well blended.;
C). Gradually add the milk and beat until the mixture thickens, about 2 minutes or until the mixture resembles ice cream. Pipe the frosting onto each cupcake using a greased " cupcake cutter "-each cupcake's cylinder base should be about 2/3 full.;
D). Add the eggs, one at a time, beating well after each one. Lightly spoon the flour into a dry measuring cup and scrape the flour level with a knife.;
D).