The direct object comes after the action verb while the subjective complement comes after a linking verb. :)
In chronological order.
Chronological definition: (of a record of events) following the order in which they occurred.
It would be “nothing more cruel” so A.
Answer : C. Helping a coworker with a task when you're done with your task
In a business where horizontal relationships exist, it is necessary to help a coworker with a task especially when you are done with yours in order to be more productive. A business with horizontal relationship has only a few layer of management that is why it is necessary to help each other.