Question: To mix the ingredients for chocolate chip cookie in a mug

  Options: 
 A. Add 1 tbsp each of melted butter, brown sugar, white sugar, and 1 egg yolk into the mug. Mix with a spoon and then add 3 tbsp of flour and chocolate chips. Mix again using the spoon.
 B. Add 1 tbsp each of melted butter, brown sugar, white sugar, and 1 egg yolk into the mug. Mix with a spoon and then add 3 tbsp of water and chocolate chips. Mix again using the spoon.
Answer: A