考查事实细节。根据关键词distance learning 可以将答案锁定在第二段。该段介绍了远程教育的特点，在段尾对其特点做了总结：Generally speaking, face-to-face communication with an instructor is minimized or eliminated altogether. 一般而言，师生面对面的交流会很少甚至没有。03.Many students take Internet-based courses mainly because they can _______.
Asave a great deal on traveling and boarding expenses
Bselect courses from various colleges and universities
Cwork on the required courses whenever and wherever
Dearn their academic degrees with much less effort