Answer: Send status report when I complete an assigned task
Step-by-step explanation:
In order to be aware of their progress, the option to choose is the "Send status report when I complete an assigned task".
To do this click on options on the tools menu, then click on task options. Then, after the keep updated copies of the assigned tasks on my task list has been selected in the check box, one will then select "Send status reports when the assigned tasks are completed".