Imagine your friend, Emily, has invited you to her birthday party next Saturday. You really want to go, but you've just remembered that your family has a long-standing tradition of visiting your elderly aunt and uncle, who live quite far away, on the last Saturday of every month. You haven't seen them in a while, and your parents expect you to go. You need to send Emily a message that politely declines her invitation, expresses your regret, and clearly explains why you can't make it without being rude or making her feel unimportant.

Which of the following messages would be the MOST appropriate and polite response to Emily?

A) "Hey Emily, I can't make it to your party next Saturday. I'm going to my aunt and uncle's. Have fun!"

B) "Thanks for the invite, Emily! I'd love to come, but unfortunately, I already have a family commitment that day that I really can't reschedule. I'm so bummed to miss out, but I hope you have an amazing birthday!"

C) "Emily, I wish I could be there, but my parents are making me go visit my boring aunt and uncle. It's so unfair! I'll try to sneak away if I can."

D) "Oh, your party is next Saturday? I think I might be busy, so I probably won't be able to come. Maybe another time."