Astronomy current events question: black holes moving matter into cosmic voids?

Astronomy 210L, spring semester 2016
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!)

Robert Massey, "Black Holes Banish Matter into Cosmic Voids" (February 25, 2016)
ras.org.uk/news-and-press/news-archive/264-news-2016/2789-black-holes-banish-matter-into-cosmic-voids

Supermassive black holes in the centers of galaxies may have moved matter into the voids between galaxies and dark matter, based on:
(A) gravitational wave measurements.
(B) computer simulations.
(C) matter and antimatter annihilation.
(D) Einstein's theory of general relativity.
(E) the cosmic background radiation.

Correct answer: (B)

Student responses
Sections 30678, 30679, 30680
(A) : 9 students
(B) : 14 students
(C) : 5 students
(D) : 3 students
(E) : 4 students