Astronomy current events question: extrasolar origins of the Hypatia stone?

Astronomy 210L, spring semester 2018
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!)

Amber Jorgenson, "The Hypatia Stone's Composition Leaves Researchers Questioning Where and How It Formed" (January 18, 2018)
astronomy.com/news/2018/01/the-hypatia-stones-composition-leaves-researchers-questioning-where-and-how-it-formed

Analysis of the composition of the "Hypatia stone" from Egypt suggest that it may have originally formed:
(A) from dark matter.
(B) within Earth's core.
(C) before our solar system.
(D) by rapidly cooling lava.
(E) on the moon.

Correct answer: (C)

Student responses
Sections 30679, 30680
(A) : 0 students
(B) : 3 students
(C) : 34 students
(D) : 2 students
(E) : 0 students