Question #N1051

The sentence below contains an error in punctuation. Which choice corrects the error? \begin{align*} \text{The group of dancers had practiced for hours, but their performance was a success, therefore, the audience gave them a standing ovation.}\end{align*}
A. The group of dancers had practiced for hours, but their performance was a success; therefore, the audience gave them a standing ovation.
B. The group of dancers had practiced for hours, but their performance was a success therefore, the audience gave them a standing ovation.
C. The group of dancers had practiced for hours, but their performance was a success, therefore the audience gave them a standing ovation.
D. The group of dancers had practiced for hours, but their performance was a success; the audience gave them a standing ovation.