Tessa and Isabelle had their birthday on the same day and they each had separate cakes. Tessa ate 20% of her cake and Isabelle ate 40% of her cake. When Tessa and Isabelle compared cakes, Tessa had eaten more cake than Isabelle. Which statement must be true? A Tessa ate twice as much cake as Isabelle. B Tessa’s cake has to be at least twice as big as Isabelle’s. C Isabelle’s cake has to be at least twice as big as Tessa’s. D Tessa cannot eat more cake because 20% is less than 40%.