I'm taking a test and have to guess the right answer to the question after the article. Article: If I see one more article about how wonderful alternative energy is compared to oil, I will flip . Alternative energy sources can be good---- very good in fact. And it's pretty obvious that we're going to need them, and that our dependence on oil is a Bad Thing. But accepting that does not mean accepting that any kind of alternative energy is a good thing. To be a good thing, it has to have three properties: 1) It has to help reduce our dependence on oil, 2) It has to be no worse for the environment, and 3) It has to be economically practical. Many of the things praised meet one or even two of those properties. Solar panels, for example. They can reduce our need for oil, at least in certain regions, and they're certainly not bad for the environment. But they're expensive. If you spend the money to make your home solar-powered, you probably won't get back your costs for at least 15 years, which approaches the lifespan of the panels. Certainly we need to clean up our act big time and find workable sources of alternative energy. But we also have to keep in mind that every one of these alternative-energy sources comes at a cost, which is something people seem to forget. They hear the phrase "alternative energy" and automatically assume it's got to be good. But green isn't always good, and oil isn't always bad. One seemingly "green" technology that pops up again and again is electric cars. It is praised by well-meaning people as good for the environment and a way to reduce our oil dependence, especially as oil prices continue to rise. Electric cars are dirty. In fact, not only are they dirty, they might even be more dirty than their gasoline-powered cousins. People in California love to talk about " zero-emissions vehicles", but people in California seem to be clueless about where electricity comes from. Power plants mostly use fire to make it. Aside from the new folks who have their roofs covered with solar cells, we get our electricity from generators. Generators are fueled by something---- usually coal, oil,... Question: It can be inferred from the text that _ . Options: A: being green is good and should be encouraged in communication B: electric cars are not clean in that we get electricity mainly by burning something C: zero-emissions vehicles should be chosen to protect our environment D: electric cars are now the dominant vehicle compared with gasoline-powered cousins
Answer:
B