材料一    吾国今日道德之根本问题，乃在革除昔日一本不易旧道德之观念，而建设今日因时制宜新道德之标准。就目前之情势观之，应规定者约有三事：（一）注重人道主义．以平等博爱诸德实行之；（二）发达个人之制己心；（三）主张极端之自由思想。

——吴康《论吾国今日道德之根本问题》

材料二   自西洋文明输入吾国，最初促吾人之觉悟者为学术，相形见绌，举国所知矣；其次为政治．年来政象所证明已有不克守缺抱残之势。继令以往，国人所怀疑莫决者, 当为伦理问题。此而不能觉悟，则前之所谓觉悟者，非彻底之觉悟，盖犹在惝恍迷离之境。吾敢断言曰：伦理的觉悟，为吾人最后之觉悟。

——陈独秀《吾人最后之觉悟》

材料三   我们今日的环境，真是不幸极了：社会的种种组织，风俗，制度，都是过渡时代、“青黄不接”——新文化未能完全产出，旧道德已宣告破产；使得国内的军政，民政，以及工商百业，都显出一种黯淡凋零的状态，比之欧洲黑暗时代，也差不多。

——左立夫《中学毕业生的切身问题）

回答问题

C

    Many scientists think that life may be very different by 2050.

    First of all, TV might not be used by 2050. People will choose music, films, programs and newspapers on the computer. And they can smell(闻) and touch things on the Internet. That sounds really interesting.

    Water pollution(污染) will become the most serious problem by 2050. Human beings will need more water than today. There will be less fresh water on the earth.

    Cars will not only run on the land but also fly in the air by 2050. That can help to alleviate the heavy traffic. There won't be any accidents, because computers will control the traffic. What's more, the speed of the plane will be much faster. It'll take only 2 hours for people to fly from Los Angeles to Tokyo.

    Robots will become very popular by 2050, because they don't ask for money and can work 24 hours a day. We'll see robots everywhere — factories, schools, hospitals, shops and homes.

    By 2050, medicine will be improved a lot. Cancer and AIDs won't be serious diseases.

白居易的《琵琶行》中有“商人重利轻别离，前月浮梁买茶去”的诗句。以下对材料中“商人”行为的阐述正确的是（    ）