The series of experiments conducted by the team in the abandoned mine ______ confirmed the existence of a previously theorized neutrino interaction.
Which choice completes the text so that it conforms to the conventions of Standard English?
- Acheck_circle
(empty)
- B
:
- C
,
- D
;
Explanation
A long subject ("The series of experiments...mine") is not separated from its verb ("confirmed") by a comma.