Anyone ______ who participates in the study must be at least eighteen years old and a resident of the metropolitan area.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
;
- Bcheck_circle
(empty)
- C
—
- D
,
Explanation
The relative clause "who participates in the study" restricts which "anyone" — it is essential. No comma should precede a restrictive clause.