Astronomy current events question: oldest rock on Earth found on the moon

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!)

Press release, "Earth's Oldest Rock Found on the Moon" (January 24, 2020)
solarsystem.nasa.gov/news/820/earths-oldest-rock-found-on-the-moon/

__________ provides evidence that a rock brought back from the moon was launched 4 billion years ago from Earth by a large impacting asteroid or comet.
(A) Chemical analysis.
(B) Fossilized bacteria.
(C) Radiocarbon dating.
(D) Magnetized iron grains.
(E) Shockwave-induced crystals.

Correct answer: (A)

Student responses
Sections 30679, 30680
(A) : 11 students
(B) : 3 students
(C) : 12 students
(D) : 1 students
(E) : 2 students