Plant biologists have long studied the symbiotic relationship between fungi and tree roots ______ this partnership, called mycorrhiza, allows nutrients to flow between the two organisms.
Which choice completes the text so that it conforms to the conventions of Standard English?
- Acheck_circle
;
- B
, however,
- C
,
- D
(empty)
Explanation
A semicolon properly joins two related independent clauses. ", " is a splice; " " is a run-on; ", however," implies wrong contrast.