Two prestigious fine art schools are located in New England, Central and Northeast. Talented vocal students attend each school. At Central, voice students are required to take voice lessons twice each week and to practice their singing at least one hour each day. At Northeast, voice students are required to take voice lessons only once per week, and they are required to practice only three times each week. The voice students from both schools were recently tested on a variety of vocal techniques, including breath control. Voice students at Central were able to hold a single note for 60 seconds, which was 15 seconds longer than the Northeast voice students. Thus, one must conclude that Northeast voice students will improve their breath control only if they increase their voice lessons to twice per week and their practice to one hour each day.
The paragraph assumes which one of the following?
(A) All students would be able to hold a note for 60 seconds if they take frequent voice lessons and practice their singing at least one hour per day.
(B) All students can have the same quality singing voices if they take voice lessons and practice one hour per day.
(C) Students with better breath control appreciate music more.
(D) Taking voice lessons twice per week and practicing one hour each day are essential factors in the ability of Central voice students to hold notes longer than the Northeast voice students.
(E) If students practice singing regularly, they will prefer voice to other forms of musical expression.