Final answer:
Option c) "Completion of the project happened on time by the team." is not in active voice and is not parallel to the others. Option C.
Step-by-step explanation:
Option c) "Completion of the project happened on time by the team." is not in active voice and is not parallel to the others.
In active voice, the subject of the sentence performs the action. In this case, the team is the subject that completes the project. Options a), b), and d) all follow this structure.
Option c) uses a passive voice construction, where the subject receives the action. The project is the subject that is being completed, which is not in active voice.
Additionally, option c) is not parallel to the others because it introduces an extra word, "happened", and does not use the same structure as the others.
Therefore, option c) is the answer.