The article was written to explain______.

A．The woman is upset because she didn’t pass the examination.
B．The woman doesn’t hope for a promotion ....
C．The man gets used to counting on the woman.
D．The man thinks that the women should be promoted.

A．prevent the sun's rays from reaching the earth's surface
B．mean a warming up in the Arctic
C．account for great changes in the climate in the northern hemisphere
D．raise the temperature of the earth's surface