Step 1: Analyze the statements.
Statement A says that if all players play to their full potential, they will win the match. Statement B says they have won the match.
Step 2: Evaluate the conclusions.
Conclusion I states that all players played to their full potential. Since the match was won, it logically follows that all players played to their full potential. Hence, conclusion I follows.
Conclusion II states that some players did not play to their full potential, which contradicts the idea that all players played their best if the match was won, as stated in statement A.
Step 3: Final Answer
The correct answer is (b) only conclusion I follows.
Final Answer: The correct answer is (b) only conclusion I follows.