Astronomy current events question: young "yellowball" stars

Astronomy 210L, spring semester 2015
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!)
Whitney Clavin, "Citizen Scientists Lead Astronomers to Mystery Objects in Space," (January 27, 2015)
Internet volunteers discovered "yellowballs" in NASA's Spitzer Space Telescope data, which may be __________ massive stars.
(A) slowly dying.
(B) gas giants orbiting.
(C) black holes swallowing.
(D) early formation stages of.
(E) rapidly approaching.

Correct answer: (D)

Student responses
Sections 30678, 30679, 30680
(A) : 2 students
(B) : 4 students
(C) : 1 student
(D) : 42 students
(E) : 2 students

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