In the life history of Ascaris lumbricoides, it needs to molt 4 times, and the place of molting is in turn as follows, which one?
A、Egg, host's small intestine, alveoli, small intestine
B、Egg, host alveoli, alveoli, small intestine
C、Egg, host alveoli, liver, small intestine
D、Egg, host alveoli, small intestine, liver