Astronomy current events question: triple-star system planet KELT-4Ab

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!)

Brian Wallheimer, "Astrophysicists Find Triple Star System with 'Hot Jupiter'" (April 7, 2016)
news.nd.edu/news/65993-astrophysicists-find-triple-star-system-with-hot-jupiter/

Preliminary observations of __________ by the Kilodegree Extremely Little Telescope led to the discovery of planet KELT-4Ab in a three-star system.
(A) dimming of star brightnesses.
(B) gravitational waves.
(C) short radio wavelengths.
(D) coronal mass ejections.
(E) intermittent stellar winds.

Correct answer: (A)

Student responses
Sections 30678, 30679, 30680
(A) : 21 students
(B) : 5 students
(C) : 3 students
(D) : 9 students
(E) : 3 students