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Verbal·Standard English Conventions·Boundaries
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On February 1, 2018, a Florida-based research team—Martha A. Scholl, Maoya Bassiouni, and Angel J. Torres-Sánchez—compiled climate data from several sites in Puerto Rico’s Luquillo Mountains. At site CC1, the site with the highest elevation, the air temperature fluctuated slightly throughout the day, registering        and 16.2°C at 8:30 p.m.
Which choice completes the text so that it conforms to the conventions of Standard English?
A
17.9°C, at 3:00 p.m. 16°C, at 5:00 p.m.
B
17.9°C at 3:00 p.m., 16°C at 5:00 p.m.,
C
17.9°C at 3:00 p.m. 16°C at 5:00 p.m.
D
17.9°C at 3:00 p.m. 16°C at 5:00 p.m.,