Which of the following statements about the passage is true?
A. Folding in peanut butter must be done with an electric appliance.
B. Beating egg whites means stirring them vigorously.
C. These cookies can be cooked in a microwave oven.
D. These cookies should be cooled on a baking rack.
in the passage, it is mentioned to "Beat egg white until foamy," which implies stirring them vigorously to achieve the desired consistency for the cookie recipe.
Therefore, the Correct Answer is B.