Astronomy current events question: traces of the oldest stars

Astronomy 210L, fall semester 2014
Cuesta College, San Luis Obispo, CA

Students are assigned to read online articles on current astronomy events, and take a short current events quiz during the first 10 minutes of lab. (This motivates students to show up promptly to lab, as the time cut-off for the quiz is strictly enforced!)

Ashley P. Taylor, "Found: Traces of Some of the Oldest Stars in the Universe," August 21, 2014
http://www.popularmechanics.com/science/space/deep/traces-of-some-of-the-oldest-stars-in-the-universe-17119568

Evidence of the oldest stars in the universe were obtained from observations from the Japanese Subaru telescope on Mauna Kea of a star:
(A) not part of any galaxy.
(B) exploding at an extremely slow rate.
(C) seen through distorted space-time.
(D) formed from their supernova fragments.
(E) being ejected from a wormhole.

Correct answer: (D)

Student responses
Sections 70178, 70186
(A) : 4 students
(B) : 6 students
(C) : 3 students
(D) : 29 students
(E) : 1 student