According to scientists’ research, the month in which babies are born could affect them in some ways.
Babies born in spring get sick easily. Children born under Aquarius (Jan. 21st—Feb. 19th) may be less clever than those born in other seasons. They may also have shorter lives than those born in autumn. Scientists believe many of the differences can be explained by the mother’s exposure to sunlight in pregnancy (怀孕). Sunlight helps lead to the production of vitamin D in the body. The lack (缺乏) of vitamin D in the first months of life may have a bad effect on health.
Vitamin D is called the “sunshine vitamin”. It has a good effect on health. A study showed that people born from April to June had slightly shorter lives than those born in October, November or December. Similar studies in the US showed that people born in autumn lived about 160 days longer than those born in spring.
Professor Russell Foster said the conclusions were surprising and interesting. He added, “These are small effects but they are very, very clear. I am not giving voice to star signs and they are just for fun. But it is true that we are affected by our season of birth.”
A child’s season of birth can affect all the following things EXCEPT______  according to the first two paragraphs.

A．his health	B．his height
C．his length of life	D．his quality of being clever

What does the underlined word “exposure” mean in Chinese?

A．偏爱

B．抗拒

C．过敏

D．暴露

What can we know about vitamin D according to the passage?

A．It comes from sunlight.

B．It helps people live longer.

C．Sunlight prevents its production.

D．It does harm to people’s health.

What does the passage mainly tell us?

A．People can know the length of life by star sign.

B．Women should choose to give birth to children in spring.

C．A child’s season of birth has an effect on him or her.

D．Vitamin D is very important to people’s health.