The ancient Mayan calendar tracked celestial cycles with remarkable accuracy ______ Mayan astronomers could predict eclipses centuries in advance.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
(empty)
- Bcheck_circle
;
- C
they
- D
, they
Explanation
A semicolon properly joins two related independent clauses. " " is a run-on; ", they" is a comma splice (and would also need to be "Mayan astronomers"); " they" is also a run-on.