Astronomy current events question: possibility of Earth fossils on the moon?

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!)

Jacob Aron, "Ancient Earth Fossils Could Be Found on the Moon," July 28, 2014
http://www.newscientist.com/article/dn25961-ancient-earth-fossils-could-be-found-on-the-moon.html

University of Kent researchers simulated how __________ on the moon could have come from meteoroid impacts on Earth.
(A) heavy water.
(B) helium-3 isotopes.
(C) microscopic fossils.
(D) amino acids.
(E) superconducting compounds.

Correct answer: (C)

Student responses
Sections 70178, 70186
(A) : 0 students
(B) : 12 students
(C) : 25 students
(D) : 3 students
(E) : 1 student