1-C. That electricity could be used all over the school - we could have hot water in the winter and air conditioning in the summer.That electricity could be used all over the school - we could have hot water in the winter and air conditioning in the summer.
2-C. My budget for rent is at most $320, preferably including gas, electricity, and water.My budget for rent is at most $320, preferably including gas, electricity, and water.
4-C. Also, use less electricity, water, or other utilities by turning off lights, for example.Also, use less electricity, water, or other utilities by turning off lights, for example.