According to the author, what may the difficult psychological stage of high school students be called

A．To show some men depend on a particular food.
B．To show the diet of some people is still primitive.
C．To show different people eat different foods.
D．To show the adaptability of man in terms of his diet.

A．The strong wind.
B．The unsuccessful warnings.
C．The heavy rain and high waves accompanying a hurricane.
D．The change of a hurricane’s direction.