Astronomy current events question: laboratory recreation of icy giant planet diamond rain

Astronomy 210L, fall semester 2017
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!)

Amanda Solliday, "Scientists Create 'Diamond Rain' That Forms in the Interior of Icy Giant Planets" (August 21, 2017)
slac.stanford.edu/news/2017-08-21-scientists-create-diamond-rain-forms-interior-icy-giant-planets.aspx

Uranus and Neptune may have diamonds raining deep within their interiors, based on:
(A) ejected micrometeroids.
(B) coherent x-ray emissions.
(C) computer simulations.
(D) laboratory experiments.
(E) surface reflectivity.

Correct answer: (D)

Student responses
Sections 70178, 70186
(A) : 8 students
(B) : 16 students
(C) : 2 students
(D) : 17 students
(E) : 8 students