💡 Detailed Explanation
The correct choice is Option 1: 'Yes, understood. I will do it in a hurry.' The sentence is a gentle command from a superior or colleague: '今日中に終わらせてね' (Please finish this document by today). Option 1 accepts the request politely and indicates prompt action ('はい、わかりました。急いでやります'). Option 2 is a blunt refusal/denial that doesn't fit a polite work context. Option 3 is a vague realization about the date.