Astronomy current events question: lunar exosphere neon

Astronomy 210L, fall semester 2015
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!)

William Steigerwald, "NASA's LADEE Spacecraft Finds Neon in Lunar Atmosphere" (August 17, 2015)
nasa.gov/content/goddard/ladee-lunar-neon

NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft confirmed the composition of the moon's "atmosphere," which is composed mainly of gases from:
(A) the solar wind.
(B) Earth's aurora borealis.
(C) asteroid impacts.
(D) passing comets.
(E) Apollo mission debris.

Correct answer: (A)

Student responses
Sections 70178, 70186
(A) : 26 students
(B) : 3 students
(C) : 4 students
(D) : 3 students
(E) : 0 students