Astronomy current events question: dark dwarf galaxy in gravitational lens SDP.81

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!)

Charles Blue
, "Dwarf Dark Galaxy Hidden in ALMA Gravitational Lens Image" (April 14, 2016)
public.nrao.edu/news/pressreleases/2016-sdp81-halo

A dark-matter dwarf galaxy was discovered by the Atacama Large Millimeter/submillimeter Array (ALMA) from how it __________ a more distant galaxy.
(A) cloaked.
(B) redshifted.
(C) sent back in time.
(D) destroyed.
(E) distorted.

Correct answer: (E)

Student responses
Sections 30678, 30679, 30680
(A) : 5 students
(B) : 7 students
(C) : 0 students
(D) : 3 students
(E) : 27 students