【单选题】When a firm decides to produce more electric cars and fewer gas guzzlers, it is most directly answering the ( ) part of one of the two big economic questions.
【单选题】When a firm decides to produce more electric cars and fewer gas guzzlers, it is most directly answering the ________ part of one of the two big economic questions. (当一家公司决定生产更多的电动汽车和更少的汽油机,它最直接地回答了两个...