Astronomy current events question: Vesta's bright and dark regions

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!)

Tariq Malik, "Probe's Photos of Asteroid Vesta Reveal Bright Surprises," March 21, 2012
http://www.msnbc.msn.com/id/46814935/ns/technology_and_science-space/#.T3pEzb_Lw0W

Recent images from the NASA Dawn spacecraft of __________ on the surface of asteroid Vesta may have originated from collisions by other asteroids.
(A) dormant volcanoes.
(B) stress fractures and ridges.
(C) bright and dark regions.
(D) polar cap ice.
(E) sulfur-rich lava flows.

Correct answer: (C)

Student responses
Sections 30678, 30679, 30680
(A) : 2 students
(B) : 13 students
(C) : 34 students
(D) : 1 student
(E) : 0 students