College admissions officers give a number of reasons for the higher rates of rejection letters this year. They say the main reason is that high school seniors are applying to more schools than in the past. Some colleges reported big increases in the number of applications. Another reason is the general increase in students going to college. Electronic forms make applying easier. For example, students can send an online form. called the Common Application to many different colleges and universities.
Many students who apply to top schools are placed on a waiting list. They do not get a decision until the school knows how many applicants who are offered admission will accept the offer. Just as students compete, so do schools.
The increasing competition for the best colleges means more worry for students and parents. They wonder just what schools are looking for. They wonder why a top student is accepted at one school but not another. The Wall Street Journal says some top schools are actively looking for students who have shown great interest in helping others. Other schools are said to be looking for students who have musical talent.
What is the passage mainly about？
(33)

A. The best universities in the United States.
B. High school students’choices after graduation.
C. Electronic application in college admission.
D. The increasing competition for the top schools in the U. S.