Astronomy current events question: martian ice age gullies

Astronomy 210L, spring semester 2015
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!)

Kevin Stacey, "Gully Patterns Document Martian Climate Cycles" (January 28, 2015)
https://news.brown.edu/articles/2015/01/gullies

Gully-like features in Martian impact craters may be evidence of __________ in Mars' past.
(A) rainforests.
(B) sporadic magma flows.
(C) weaker sandstorms.
(D) several ice ages.
(E) marsquake avalanches.

Correct answer: (D)

Student responses
Sections 30678, 30679, 30680
(A) : 1 student
(B) : 3 students
(C) : 2 students
(D) : 44 students
(E) : 0 students