Frida Kahlo's most celebrated paintings ______ many of them self-portraits ______ explore themes of identity and physical pain.
Which choice completes the text so that it conforms to the conventions of Standard English?
- A
, —
- B
(, )
- C
—,
- Dcheck_circle
—, —
Explanation
A pair of em-dashes (—, —) properly sets off a nonessential parenthetical with internal punctuation or for emphasis. Mixed pairings are ungrammatical.