Options:
A = It is recommended to set 2 degrees warmer in the winter to save energy and reduce carbon footprint.
B = Longer showers are not good for conserving water and energy consumption.
C = Driving or riding cars more often produces more carbon footprint than reduction.
D = Setting the thermostat up 2 degrees during summer is not a good option since in summer even a 2 degrees increase in temperature harms our general body functions because we will feel sluggish.
ANSWER: A