Astronomy current events question: galaxy M95 type II supernova

Astronomy 210L, spring semester 2012
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!)

Clara Moskowitz, "Source Star of New Supernova Explosion Believed Found," March 23, 2012
http://www.msnbc.msn.com/id/46835052/ns/technology_and_science-space/#.T3pEzb_Lw0V

The recent type II supernova in galaxy M95 was confirmed by __________ to have come from an exploding supergiant.
(A) comparing archived Hubble Space Telescope photos.
(B) using gravitational lensing.
(C) manipulating lookback time.
(D) gamma ray burst recordings.
(E) underground neutrino detectors.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 29 students
(B) : 5 students
(C) : 5 students
(D) : 11 students
(E) : 0 students