Which sentence does not contain any punctuation errors?

A.Following an introduction, Ms. Graves, the chair of the foundation, spoke, she received a standing ovation.

B.Following an introduction, Ms. Graves, the chair of the foundation, spoke; and she received a standing ovation.

C.Following an introduction, Ms. Graves, the chair of the foundation, spoke, and she received a standing ovation.

D.Following an introduction, Ms. Graves, the chair of the foundation, spoke, and received a standing ovation.