Astronomy current events question: Spiderweb Galaxy star formation

Astronomy 210L, fall semester 2014
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!)

Helmut Dannerbauer, Carlos De Breuck, Richard Hook, "Construction Secrets of a Galactic Metropolis," (October 15, 2014)
http://www.eso.org/public/news/eso1431/

The European Southern Observatory APEX telescope observed stars forming in the Spiderweb Galaxy using long-wavelength light, which:
(A) reflects off of hydrogen gas clouds.
(B) is not blocked by Earth's atmosphere.
(C) is extremely old.
(D) passes through dust clouds.
(E) does not come from dying and dead stars.

Correct answer: (D)

Student responses
Sections 70178, 70186
(A) : 9 students
(B) : 1 student
(C) : 1 student
(D) : 23 students
(E) : 1 student