|Question 17Verbal

Source Texts

Text
On March 3, 2005, American astronomers detected a striking and unusual phenomenon occurring in the constellation Coma Berenices, 4.7 billion light-years from        explosion of a massive star, also known as a supernova, an extremely bright yet transient event that typically results from the collapse of a star's core.
Which choice completes the text so that it conforms to the conventions of Standard English?
Earth, it was the
A
Earth the
B
Earth. The
C
Earth: the
D