【正确答案】 C

【答案解析】原文：Researchers are sailing to a distant part of Antarctica. So they can better understand how much and how fast seas could rise because of global warming. The area which is where the Thwaites glacier is located is sometimes called the place in the world that’s the hardest to get to. 32 scientists are starting a more than 2 month-trip aboard an American research ship. Their goal is to study the area where the large but melting Thwaites glacier faces the amounts in sea.根据新闻可知，四腿机器人研究的一个障碍仍然是耗电量。故选C。