Final answer:
Principle C is about choosing a firm's battles, highlighting the importance of strategic decision-making in achieving success.
Step-by-step explanation:
According to the text provided, Principle C reflects the concept of choosing a firm's battles strategically, aligning with the text's reference to knowing when to fight and when not to, and selecting the battles that best align with core values and strategic interests. This concept is essential for achieving victory and success in both military and business contexts, emphasizing the critical nature of strategic decision-making.