What is Becky Thatcher's biggest problem after going to the picnic, and how is it resolved?
A. She and Tom get lost in the cave, but Tom finds a way out.
B. Tom decides he likes Amy Lawrence more, but Becky wins him back by being brave in the cave.
C. She loses the ribbons in her hair, but Tom finds them for her.
D. She accidentally tears the school teacher's book, but Tom takes the blame for it.