Final answer:
The correct answer is option C. The sentence that indicates healthy self-confidence is 'I gave %100 on the field today, just as I do at every game.' It reflects self-assurance and commitment without comparisons or arrogance.
Step-by-step explanation:
"I gave %100 on the field today, just as I do at every game." This sentence indicates a positive self-assessment without comparison to others or signs of arrogance. It is a reflection of Darnell's dedication to his effort and performance.
This statement reflects Darnell's confidence in his performance and his consistency in giving his best effort in every game. Thus, correct answer is option c.