PrepTest 119, Section 4, Question 8

What we’re looking for

Working the answers

• A
  Correct

  No off-campus student belongs to the choir. But every music major must belong to the choir. An off-campus student therefore can't be a music major: that would require the student to be both outside the choir and in it.

  This expresses the housing connection from the off-campus side rather than in the wording I predicted. It still closes the exact gap. A music major is a choir member, and A rules out any choir member living off campus.

• B

  This restates the premise that music majors join the choir. We already know that. Repeating it doesn't tell us where choir members live, so the hypothetical off-campus music major is still possible.

• C

  Some on-campus students not being music majors doesn't settle anything about the off-campus students. Perhaps some students in the dorms study business. That can be true whether or not other students study music while living in apartments off campus.

• D

  This runs from living on campus to being a music major. We need to rule out a music major living off campus. Both could be true at once: every on-campus student studies music, and an additional music student lives off campus. D doesn't restrict the location of all music majors.

• E

  Now choir membership would establish that a student studies music. That isn't what the original premise said: originally, a business major could also sing in the choir as a hobby. But even if we add E's stronger link, we still learn nothing about housing. The choir and music-major groups could coincide while some members live off campus.