You need to develop to test your hypothesis

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Ineed to know why d is the correct answer asap