Many students take Internet -based courses mainly

By almost any measure , there is a boom in Internet-based instruction . In just a few years , 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools , it’s closer to 90 percent . If you doubt the popularity of the trend, you probably haven’t. It enrolls 90,000 student, a statistic used to support its claim to be the largest private university in the country.

While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructions post syllabi(课程大纲), reading assignments , and schedules on Websites , and students send in their assignments by e-mail . Generally speaking, face-to-face communication with an instructor is minimized or eliminated altogether.

Many students take Internet -based courses mainly because they can_____

A) Earn their academic degrees with much less effort

B) Save a great deal on traveling and boarding expenses

C) Select courses from various colleges and universities

D) Work on the required courses whenever and wherever