Adam resolves his internal conflict primarily through option C: "Adam draws inspiration from the disappointing apple he eats and begins telling Garrison's story."
In the passage, Adam's frustration and writer's block are alleviated when he bites into a mealy apple, which serves as a metaphor for the disappointment he seeks to address in his article about Garrison Peters. This moment of inspiration prompts him to start typing and convey the true story that needs to be told, thus resolving his internal conflict.