Recent telescope observations have confirmed one long-standing prediction of Einstein's general relativity ______ massive objects warp the fabric of spacetime around them.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
;
- B
, that
- Ccheck_circle
:
- D
(empty)
Explanation
A colon introduces an elaboration of "one long-standing prediction." A semicolon would also work but a colon better signals direct explanation; " " is a run-on; ", that" creates a fragment.