单选题 What did Marty Dettling mean when she said, "It's going to be big?"

A、 Green buildings have a great potential.
B、 People expect bigger green buildings.
C、 Green buildings will be larger in size.
D、 People prefer to live in bigger buildings.

【正确答案】 A

【答案解析】[注释] 首先应找到文章的最后一个句子，分析句子中的支持信息和线索。可以判断， green buildings will become common in the future与it's going to be big为同义句子。所以，A项选择的“绿色建筑具有很大潜力”最接近依据句的意思。其他选项的信息在文章中没有出现。