Answer:
Power shortages and blackouts may increase.
Explanation:
Reason is as stated in the paragraph, "As people use more air conditioning, electricity shortages and blackouts could increase."
Therefore that needs to be the answer.
The first and second choice is not a strong answer while the last one "Greenhouse gases are being added to the environment." is a strong answer but, as stated in the paragraph, "also add more greenhouse gases to the atmosphere."
its choice c
Its probably B. its literally in the sentence <span />
The answer is gait.
Definition of gait : a person's manner of walking