SAT English Practice Question

The study found that the majority of participants who did not use the program reported that it would have been "helpful" to their work. The participants who did use the program also reported that it was "helpful" to their work. Which choice corrects the punctuation error in the sentence?

1. A.The study found that the majority of participants who did not use the program reported that it would have been "helpful" to their work. The participants who did use the program also reported that it was, "helpful" to their work.
2. B.The study found that the majority of participants who did not use the program reported that it would have been "helpful" to their work; the participants who did use the program also reported that it was "helpful" to their work.
3. C.The study found that the majority of participants who did not use the program reported that it would have been "helpful" to their work, the participants who did use the program also reported that it was "helpful" to their work.
4. D.The study found that the majority of participants who did not use the program reported that it would have been "helpful" to their work. The participants who did use the program also reported that it was "helpful" to their work.