The variety of plant species capable of thriving in the harsh conditions of the high-altitude meadow ______ astonishes botanists who visit the site for the first time.
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 variety...meadow") is not separated from its verb ("astonishes") by a comma.