Please choose the correct solution to the question: How to make whipped cream.

Solution1: Place a metal mixing bowl and metal whisk into the freezer for 10 to 15 minutes.    Place sugar into the mixing bowl and add the whipping cream. Whisk just until the cream reaches stiff peaks. Store any unused portion in an airtight container for up to 10 hours.

Solution2: Place sugar into the mixing bowl and add the whipping cream. Whisk slowly for up tp 30 seconds. Store any unused portion in an airtight container for up to 10 hours.

Answer format: solution1/solution2
Answer: solution1