Which of the following statements best summarizes the writer's conclusion about the function of breakfast?

• A、Omitting breakfast helps improve work

• B、Eating breakfast is absolutely necessary

• C、Scientists have produced sufficient evidence in support of breakfast.

• D、There isn't strong evidence to prove that breakfast is a must.

56 （）

28 （）

• A、carefully

• B、easily

• C、effectively

• D、Finally