单选题 Most nearly parallel, in its fundamental approach to the drip system solution described in the passage would be a machine designed to

• (A) save electricity by converting unused sunlight into power through the use of photocells
• (B) waste less electricity by insulating and reducing resistance in the conduits of the power grid
• (C) increase electrical efficiency by requiring consumers to use appliances that rely on less electricity
• (D) create a more reliable power grid by supplying electricity from a wider range of power plants
• (E) reduce the electricity necessary to powering a city by encouraging denser population growth