How to punctuate an answer to a question when the answer is also a question?

Question

The title to this question is sort of long-winded but the example here should clarify it. Which of these is correct? 1. Who should be baby-sitting your children, your neighborhood teenagers or professionally trained people? 2. Who should be baby-sitting your children? Your neighborhood teenagers or professionally trained people? 3. Who should be baby-sitting your children? Your neighborhood teenagers? Or, professionally trained people? I think option 1 is definitely wrong. Option 2 or 3 could both work but I am not sure.

Answer 1

Actually, answer choices 1 and 2 are the best responses for this scenario. Consider there are two independent thoughts. The first thought is whether indeed anyone should be sitting for your children. The next thought is who (assuming the choices are narrowed down to only teens or pros) should do the sitting?

Answer choice 1 becomes: Who should be baby-sitting your children: neighborhood teens or professionals? Change the comma to a colon and you're good to go.

Answer choice 2 as you stated it is fine. The first question remains by itself, i.e., who should be .....? The second question simply combines the two choices of sitters, i.e., teens or pros?