Astronomy current events question: solar winds releasing lunar water vapor

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!)

Elizabeth Zubritsky, "Meteoroid Strikes Eject Precious Water From Moon" (April 15, 2019)
nasa.gov/press-release/goddard/2019/ladee-lunar-water

Data collected by NASA's Lunar Atmosphere and Dust Environment Explorer spacecraft verified that water vapor on the moon is released by:
(A) solar winds.
(B) cryovolcanoes.
(C) helium hydride.
(D) meteorite impacts.
(E) gravitational waves.

Correct answer: (D)

Student responses
Sections 30679, 30680
(A) : 6 students
(B) : 3 students
(C) : 6 students
(D) : 20 students
(E) : 1 student