The earliest known printed book ______ the Diamond Sutra, dated to 868 CE ______ is housed in the British Library.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
— / —
- B
( / )
- C
; / ;
- Dcheck_circle
, / ,
Explanation
Paired commas, parentheses, or em dashes can each set off a parenthetical, but matched commas best fit the gentle integration of the appositive into the sentence; choice A uses paired commas (matched), which is correct.