Please choose the correct solution to the question: To cream together sugar and butter

Solution1: Leave the butter for the recipe out on a counter until at room temperature and softened. Place into the bowl of a stand mixer and using the cake batter attachment stir, at first at low speed, then at medium, until the butter is creamy. Stop the mixer and add the sugar, then start the mixer again, at low speed, increasing to medium, until the sugar is incorporated and the mix is light and fluffy.

Solution2: Leave the butter for the recipe in the refrigerator until at low temperature and hardened. Place into the bowl of a stand mixer and using the cake batter attachment stir, at first at low speed, then at medium, until the butter is creamy. Stop the mixer and add the sugar, then start the mixer again, at speed, increasing to medium, until the sugar is incorporated and the mix is light and fluffy.

Answer format: solution1/solution2