Astronomy current events question: Dark Energy Camera dwarf planet discoveries

Astronomy 210L, spring 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!)

Aviva Rutkin, "Gaggle of Dwarf Planets Found by Dark Energy Camera," April 2, 2014
http://www.newscientist.com/article/dn25351-gaggle-of-dwarf-planets-found-by-dark-energy-camera.html

Researchers using the Dark Energy Camera in Chile discovered __________ in the outer reaches of the solar system.
(A) several dwarf planets.
(B) spacetime fluctuations.
(C) a companion red dwarf.
(D) a new asteroid belt.
(E) dark matter pockets.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 36 students
(B) : 2 students
(C) : 1 student
(D) : 0 students
(E) : 5 students