Which choice completes the text so that it conforms to the convention…

|Question 16Verbal

Source Texts

Text

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

1 6^{\circ} C

at 5:00 p.m.

Which choice completes the text so that it conforms to the conventions of Standard English?

15. 4^{\circ} C

at 1:00 a.m.

18. 6^{\circ} C

at 11:30 a.m.

15. 4^{\circ} C

at 1:00 a.m.

18. 6^{\circ} C

at 11:30 a.m.,

15. 4^{\circ} C

, at 1:00 a.m.

18. 6^{\circ} C

, at 11:30 a.m.

15. 4^{\circ} C

at 1:00 a.m.,

18. 6^{\circ} C

at 11:30 a.m.,