It can be inferred from the passage that, before the Industrial Revolution, most women worked in______.

A．lack of natural enemies
B．great care of wildlife preservationists
C．favorable conditions in their winter habitat
D．changes in their migration patterns

A．the snow geese will be in danger
B．the agriculture of the area will suffer
C．the Canada geese will replace the snow geese
D．the snow geese may move to breed in Minnesota