Astronomy current events question: oxygen extraction from lunar material?

Astronomy 210L, spring semester 2020
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!)

News release, "ESA Opens Oxygen Plant--Making Air Out of Moondust" (January 17, 2020)
esa.int/Enabling_Support/Space_Engineering_Technology/ESA_opens_oxygen_plant_making_air_out_of_moondust

The European Space Agency demonstrated that a molten salt electrolysis process could extract __________ from material on the moon.
(A) gold.
(B) oxygen.
(C) helium-3.
(D) salt water.
(E) amino acids.

Correct answer: (B)

Student responses
Sections 30679, 30680
(A) : 0 students
(B) : 31 students
(C) : 1 student
(D) : 1 student
(E) : 2 students