Which statement explains what the earth's climate would be like if the amount of chlorofluorocarbons in the atmosphere substantially increased?

a.
more heat may be trapped in the earth’s atmosphere resulting in an increase in the earth’s average surface temperature.

b.
less heat may be trapped in the earth’s atmosphere resulting in a decrease in the earth’s average surface temperature.

c.
less heat may be trapped in the earth’s atmosphere resulting in an increase in the earth’s average surface temperature.

d.
more heat may be trapped in the earth’s atmosphere resulting in a decrease in the earth’s average surface temperature.