|Question 40Verbal

Source Texts

Text
Occurring in the constellation Coma Berenices, 38 million light-years from Earth, SN 1940B was a _____ explosion of a massive star, which blasts large amounts of radiation, heavy elements, and debris into space—that was first detected by American astronomer Josef Johnson.
Which choice completes the text so that it conforms to the conventions of Standard English?
supernova, the
A
supernova. The
B
supernova—the
C
supernova: the
D