Astronomy current events question: notable gamma ray burst

Astronomy 210L, Fall Semester 2009
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!)

Alan MacRobert, "Blast from the Very Far Past," October 28, 2009
http://www.skyandtelescope.com/community/skyblog/newsblog/66941457.html

What is notable about the gamma ray burst detected by the Gemini North Telescope in Hawaii last April, recently published in a peer-reviewed journal?
(A) Most energetic explosion known.
(B) Disputed as an instrument calibration error.
(C) Echo of the original big bang.
(D) Seen to be evolving backwards in time.
(E) Earliest explosion yet observed.

Correct answer: (E)

Student responses
Section 70178
(A) : 3 students
(B) : 2 student
(C) : 5 students
(D) : 2 students
(E) : 8 students