Please choose the correct solution to the question: To make a sponge cake,

Solution1: once you have beaten your eggs, added the sugar and beaten into a light and fluffy batter, add flour with a sifter and fold the batter to mix it.

Solution2: once you have beaten your eggs, added the sugar and beaten into a light and fluffy batter, dump the flour in and continue beating the mixture.

Answer format: solution1/solution2
Answer: solution1