Astronomy current events question: Pluto's "icy winds"

Astronomy 210L, spring semester 2020
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!)

Lauren Lipuma, "Pluto's Icy Heart makes Winds Blow" (February 4, 2020)
news.agu.org/press-release/plutos-icy-heart-makes-winds-blow/

Computer models explain how __________ on Pluto's heart-shaped Tombaugh Region may affect regional wind patterns.
(A) ice volcanoes.
(B) vapor geysers.
(C) methane pools.
(D) frozen nitrogen.
(E) erosion canyons.

Correct answer: (D)

Student responses
Sections 30679, 30680
(A) : 2 students
(B) : 1 student
(C) : 0 students
(D) : 35 students
(E) : 0 students