During a retrofit, the replacement r-134a charge should be than the specified r-12 charge. a. 20–30% more b. 10–20% less c. 20–30% less d. 10–20% more

I belilive it would be 10-20% less in a retrofit application. 

Heyhonestly, probably not. humans have always had a tendency to waste things. whether it's food, cosmetic, infrastructure, or our abandoned constructions,the landscape is littered with the refuseof man. archaeology wouldn't be a developed discipline if humans didn't leave things behind. in a way it makes us human

hope it mark me as brainlieast.