Final answer:
Raising grades from failing to mostly A-grades had the least impact on Elliott's recovery.
Step-by-step explanation:
The factor that had the least impact on Elliott's recovery was raising his grades from failing to mostly A-grades.
Elliott's recovery was influenced by finding purpose in life, adopting a positive outlook, and engaging in meaningful relationships. These factors played a significant role in his overall well-being and ability to recover.
However, raising grades from failing to mostly A-grades, while beneficial for academic success, did not have as direct of an impact on Elliott's recovery as the other factors.