Astronomy current events question: Comet 67P/Churyumov-Gerasimenko dust jets

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!)

Birgit Krummheuer, Holger Sierks, "A Comet Spews Dust," (October 23, 2014)
http://www.mpg.de/8718548/67p_churyumov-gerasimenko_dust

The European Space Agency's Rosetta spacecraft observed dust caused by __________ streaming from comet 67P/Churyumov-Gerasimenko.
(A) Earth's magnetic field.
(B) its laser probe.
(C) Jupiter's tidal forces.
(D) micrometeorites.
(E) sunlight.

Correct answer: (E)

Student responses
Sections 70178, 70186
(A) : 5 students
(B) : 4 students
(C) : 4 students
(D) : 10 students
(E) : 12 students