问题详情

When Steve McDougal says "It"s not a financial hardship, but it is an incremental amount of money that"s not required," she means that ______.
A．Green tag costs a lot of money.
B．Green tag costs an extra amount of money.
C．Green tag"s is cost-effective.
D．The cost on green tags is far less than the companies pay to purchase renewable power from suppliers.请帮忙给出正确答案和分析，谢谢！