💡 Detailed Explanation
The correct choice is Option 1: 'Yes, sounds good. Let's go.' When invited with '〜ませんか' (Would you like to...?), a cheerful agreement is formulated as 'ええ、いいですね。行きましょう' (Oh, that sounds great. Let's go). Option 2 ('いいえ、見に行きます' - No, I will go watch) is grammatically conflicting. Option 3 uses the past tense for a future invitation, which is incorrect.