Astronomy current events question: Venus alive?

Astronomy 210L, Spring Semester 2010
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!)

Astronomy.com editors, "Venus Is Alive, Geologically Speaking," April 9, 2010
http://www.astronomy.com/asy/default.aspx?c=a&id=9736

What is the evidence from the European Space Agency's Venus Express spacecraft that Venus may still be geologically active?
(A) Newly discovered impact craters.
(B) Rising volcanic peaks.
(C) Different compositions of certain lava flows.
(D) Gases released from fissures.
(E) Impact craters missing from earlier photos.

Correct answer: (C)

Student responses
Sections 30678, 30679, 30680
(A) : 1 student
(B) : 10 students
(C) : 28 students
(D) : 1 students
(E) : 21 students