Which of the following represents the average increase in earth's temperature during the last century?

A) 0.6 degree Celsius

B) 0.7 degree Celsius

C) 0.8 degree Celsius

D) 0.9 degree Celsius

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2012 (GS Paper I)