Although the trail had been marked decades earlier ______ erosion and overgrowth had erased many of the original blazes.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
:
- Bcheck_circle
,
- C
;
- D
(empty)
Explanation
A subordinating conjunction ("Although") begins a dependent clause; when it precedes the independent clause, a comma separates the two.