David is working on e. defining his "good attitude" behaviors.
Step-by-step explanation:
David is trying to become healthier, and judge positive implications in daily life for good attitude. Good attitude of David is defined, as he started running each night after finishing his office work. He finished running before heading to home. This helped David to pay more attention to his family.
Running helps him to increase his focus on his work day. David is working on defining good attitude behaviors. Good attitude involves helping other without hurting their feelings.