This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to make mascarpone
Fill the bain marie with water, and place on a stove top over high heat.
Gas stoves work best. As the pans and water heat up, you may reduce and readjust the heat.

Select from the following. (1). Add 1 quarter of heavy cream to the top of the bain-marie. Heat, stirring constantly, to a steady temperature of about 180 degrees f (about 82 c). (2). Simmer uncovered until the water boils and the sugar is dissolved. Be careful not to let it boil too long-whisking constantly may expose the parsley, which will taste bitter. (3). Once the water is absorbed, add the water, one minute at a time, and mix with a whisk in order to combine. As the water heats up, reduce and reposition the heat to high. (4). Place 2 inches (5 cm) of the saucepan over medium heat. You will be using the slow cooker to cook the mascarpone.
The answer is:
(1).