Which line implies that Alice finds Tweedledee and Tweedledum’s battle preparations quite silly?
A. “You know,” he added very gravely, “it's one of the most serious things that can possibly happen to one in a battle—to get one's head cut off.”
B. Alice laughed aloud: but she managed to turn it into a cough, for fear of hurting his feelings.
C. “Do I look very pale?” said Tweedledum, coming up to have his helmet tied on.
D. “I'm very brave generally,” he went on in a low voice: “only to-day I happen to have a headache.”