(i) The average temperature of the Earth's surface is gradually decreasing. |
(ii) Carbon dioxide, methane and nitrous oxide are responsible for global warming, |
(iii) The average temperature of the sun's surface is gradually increasing. |
A) (i) only
B) (i) and (iii) only
C) (ii) only
D) (ii) and (iii) only
Correct Answer: B
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