Select the sentence that contains NO errors in grammar, punctuation, spelling, sentence structure, or word usage.

A. Since Jules was a past donor he was not aloud to participate in the State's upcoming election.
B. The training course was so grueling that Jules began to wonder whether he would ever get his certificate.
C. Because the defendent was compliant with the judge's demands, his sentence was reduced.
D. After coming home from work, Janis liked to turn on the radio, while she made a light snack.

I'll be happy to check your answer.

Would it be B?

Yes, B.

B. The training course was so grueling that Jules began to wonder whether he would ever get his certificate.

To determine which sentence contains no errors in grammar, punctuation, spelling, sentence structure, or word usage, we will analyze each option:

A. Since Jules was a past donor he was not aloud to participate in the State's upcoming election.
Error: The word "aloud" should be "allowed."

B. The training course was so grueling that Jules began to wonder whether he would ever get his certificate.
No errors found.

C. Because the defendent was compliant with the judge's demands, his sentence was reduced.
No errors found.

D. After coming home from work, Janis liked to turn on the radio, while she made a light snack.
Error: The conjunction "while" should be "and" to maintain parallelism.

Based on the analysis, the sentence with NO errors is: B. The training course was so grueling that Jules began to wonder whether he would ever get his certificate.