💡 Detailed Explanation
The man, likely a superior, is politely assigning a task using the formal phrase '差し支えないかな' (Is it okay if...). The expected response in a business context is to accept the responsibility willingly. Option 1, 'Yes, please leave it to me,' is a positive and appropriate acceptance. Option 2 is a hesitant refusal. Option 3, 'いえ、結構です,' is a blunt way to decline an offer and is inappropriate for refusing a work assignment from a superior.