Final answer:
The references provided emphasize knowledge and preparation, leading to the conclusion that "The Big Game" teaches that teamwork is the root of success.
Step-by-step explanation:
Considering the provided references, it's clear that "The Big Game" teaches readers about the importance of knowledge and preparation. The statements suggest that understanding one's capabilities, having foreknowledge, and relying on one's training are crucial. Hence, option A, which mentions making the best of a bad situation, seems less relevant as it doesn't emphasize the role of preparation or skill. Option C, suggesting ignorance is bliss, is contrary to the theme of knowledge and preparedness emphasized throughout the references. Therefore, the lesson taught in "The Big Game" aligns closest with option D - teamwork is the root of success, which underscores the importance of collaborative efforts and thorough understanding in achieving goals.