问题详情

What does the professor imply when he says this:
A．The caterpillar"s life purpose is almost complete.
B．The caterpillar will soon emerge from the pupa.
C．The caterpillar has migrated to a new habitat.
D．The caterpillar is about to lay its eggs.请帮忙给出正确答案和分析，谢谢！