Astronomy current events question: Jupiter impact aftermath

Astronomy 210L, Fall Semester 2009
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!)

Kelly Beatty, "Jupiter's Impact: Gone in 30 Days," August 27, 2009
http://www.skyandtelescope.com/news/53952917.html

What has happened to the new dark spot on Jupiter caused by a recent impact?
(A) Large enough to affect Jupiter's weather patterns.
(B) Changed from dark brown to red.
(C) Split into two small dark spots.
(D) Nearly disappeared.
(E) Moved to Jupiter's north pole.

Correct answer: (D).

Student responses
Sections 70178, 71086
(A) : 5 students
(B) : 3 students
(C) : 1 student
(D) : 34 students
(E) : 1 student