Astronomy current events question: recent Venus lava flows?

Astronomy 210L, fall semester 2016
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!)

Nathaniel Scharping, "Venus Explodes with Volcanoes in the Present Day" (October 18, 2016)
astronomy.com/news/2016/10/venus-explodes-with-volcanoes-in-the-present-day

Researchers used computer models to combine data from NASA's Magellan spacecraft and the European Space Agency's Venus Express spacecraft to determine that the Idunn Mons volcano on Venus may have:
(A) had ice glaciers.
(B) recent lava flows.
(C) a molten sulfur lake.
(D) been created by a large impact.
(E) disrupted Venus' rotation.

Correct answer: (B)

Student responses
Sections 70178, 70186
(A) : 0 students
(B) : 20 students
(C) : 3 students
(D) : 2 students
(E) : 1 student