John: Mary, can you tell me how to make instant coffee?
Mary: Sure! First, boil some water. Then, put a spoon of coffee into a mug. After that, pour the hot water into the mug and stir. Finally, add sugar or milk if you like.
What is the first step Mary tells John to do?
A) Put a spoon of coffee into a mug.
B) Boil some water.
C) Add sugar or milk.
D) Pour hot water into the mug.