Astronomy current events question: new particle or fundamental force?

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!)

Elizabeth Landau, "Is It A New Particle, Or Just A Fluke?," April 8, 2011
http://www.cnn.com/2011/US/04/08/particle.physics.tevatron/

Fermilab scientists announced results from __________ may be evidence of a previously undiscovered particle or fundamental force.
(A) radio interference.
(B) proton and antiproton collisions.
(C) miniature black holes.
(D) dark matter samples.
(E) the Sendai earthquake.

Correct answer: (B)

Student responses
Sections 30678, 30679, 30680
(A) : 10 students
(B) : 28 students
(C) : 2 students
(D) : 8 students
(E) : 2 students