【正确答案】 B

【答案解析】[听力原文]
M: We need to design an even more efficient and energy saving air conditioner.
W: But we just launched a compact air conditioner with variable controls and HEPA filtering a few months ago!
M: That was a few months ago. We need to keep innovating to stay ahead of the competition. I"m thinking some kind of portable air conditioner that can be moved from room to room, like a fan, but more powerful.
W: You"re right. With electricity prices going up, our customers are going to be looking for a less costly way to keep cool.

选项A没有提及。选项B正确，对话中提及了空调。选项C和D在对话中没有提及。

【正确答案】 D

【答案解析】选项A错误，根据对话可以推断出他们在竞争中占先。选项B错误，文中提及了空调耗能很大，但这不是主要的担忧。选项C错误，价格的增长没有提及。选项D正确，对话中男士明确提出他们需要在竞争中保持领先。

【正确答案】 A

【答案解析】选项A正确，便携性是提到的特点之一。选项B错误，她只是提到人们想要省钱。选项C错误，costly的意思是价格昂贵，所以这不应是优点。选项D错误，有竞争力不是产品的特点。