Answer :
Sentence C because it is an appositive sentence (comma sandwich)
An appositive sentence uses commas to separate an additional fact or idea.
EX: My sheep, the black one, is very friendly.
The underlined phrase is the appositive phrase
An appositive sentence uses commas to separate an additional fact or idea.
EX: My sheep, the black one, is very friendly.
The underlined phrase is the appositive phrase