Astronomy current events question: Saturn-Enceladus electrical link

Astronomy 210L, Spring Semester 2011
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!)

Jia-Rui C. Cook, Dwayne Brown, "Cassini Sees Saturn Electric Link With Enceladus," April 19, 2011
http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20110420.html

NASA's Cassini spacecraft detected _________ near Saturn's north pole, related to an electric and magnetic connection between Saturn and one of its moons, Enceladus.
(A) a patch of ultraviolet light.
(B) radio transmission interference.
(C) faint arcs of lightning.
(D) water vapor and organic particles.
(E) radioactivity.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 6 students
(B) : 5 students
(C) : 2 students
(D) : 4 students
(E) : 2 students