Mercury has almost no atmosphere ______ Venus has the densest atmosphere of any rocky planet.
Which choice completes the text so that it conforms to the conventions of Standard English?
- Acheck_circle
;
- B
, and
- C
(empty)
- D
,
Explanation
A semicolon cleanly contrasts two independent clauses without a conjunction. ", " is a comma splice; " " is a run-on; ", and" weakly states the relation as additive.