单选题 Why do some companies populate their sites with many incoming links from others?

A、 It increases the volume of information in the webpage.
B、 It increases the popularity of the site.
C、 It makes the site much more informative.
D、 It makes the site seemingly more authoritative and popular.

【正确答案】 D

【答案解析】[分析] 见第四段第二句话：This approach makes a site appear more authoritative and popular than it really is and thus rise in rankings．(这种做法让网站显得比实际情况更权威、更流行，提高排名。)