Astronomy current events question: seasonal rain on Titan's north pole

Astronomy 210L, spring semester 2019
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 and Leigh Cooper, "New Study Finds Evidence of Changing Seasons, Rain on Titan's North Pole" (January 19, 2019)
news.agu.org/press-release/new-study-finds-evidence-of-changing-seasons-rain-on-titans-north-pole/

Analysis of __________ observed by NASA's Cassini spacecraft may be evidence of seasonal methane rains on Saturn's moon, Titan.
(A) infrared reflections.
(B) flowing hydrocarbon streams.  
(C) lightning strikes.  
(D) moving icebergs.
(E) cyclonic storm clouds.

Correct answer: (A)

Student responses
Sections 30679, 30680
(A) : 20 students
(B) : 2 students
(C) : 1 student
(D) : 0 students
(E) : 21 students