Astronomy current events question: arcuate striations on Mars

Astronomy 210L, spring semester 2017
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!)
Thomas Deane, "Researchers Pinpoint Watery Past on Mars" (February 15, 2017)
Comparison of "arcuate striations" in the Namib Desert on Earth with similar features on Mars observed by NASA's Mars Reconnaissance Orbiter indicate that both may be caused by repeated:
(A) ocean waves.
(B) dry ice snowfalls.
(C) magnetic pole fluctuations.
(D) dust storms.
(E) groundwater flooding.

Correct answer: (E)

Student responses
Sections 30679, 30680
(A) : 7 students
(B) : 1 student
(C) : 3 students
(D) : 6 students
(E) : 14 students

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