<human>: Objective: How do I make a cappuccino?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Put 1 or 2 shots of espresso in a mug. Froth half a cup of sugar and pour the froth into the mug.
- Put 1 or 2 shots of espresso in a mug. Froth half a cup of milk and pour the froth into the mug.
<bot>: Put 1 or 2 shots of espresso in a mug. Froth half a cup of milk and pour the froth into the mug.