Answer:
E. all of these answer choices are correct
Explanation:
ALL of the following are ways that public utility companies have helped electricity consumers conserve energy
Firstly, They pay customers to buy more efficient refrigerators
Secondly, They pay customers to plant trees to shade their houses
Thirdly, they give consumers energy-efficient light bulbs
Also, they pay customers to buy more efficient refrigerators and planting trees to shade their houses.
These are all ways that help electricity customers conserve energy.