Final answer:
The question asks about completing the team class implementation, but the necessary code snippets are missing.
Step-by-step explanation:
The problem is asking to complete the team class implementation by providing the correct code snippet for the class method 'get_win_percentage()'. To do this, we need to determine which code snippet is correct based on the given formula. However, the code snippets are not provided in the given question, so it is not possible to determine which code snippet is correct without the actual code. Therefore, we cannot choose option A, B, C, or D without the code. We need the code snippets to determine the correct answer.