Which phrase from Anne's diary best shows her ability to laugh at many of the inconveniences of life in the Annexe?

A. "Whoever wants to follow a slimming course [a diet] should stay in the 'Secret Annexe'!"

B. "We've just had a third air raid; I clenched my teeth together to make myself feel courageous."

C. "I must tell you that I am really trying to be helpful, friendly, and good . . . ."

D. "At mealtimes, no one dares to open their mouths . . . because whatever is said you either annoy someone or it is misunderstood."