Questions will be answered by a . . . . . . . . of experts.

The correct answer is D. panel.

A panel is a group of people who are brought together to discuss or advise on a particular issue. In this case, the panel of experts will be answering questions about a specific topic.

A group is a larger collection of people who may or may not have a common purpose. A staff is a group of people who work for an organization or company. A band is a group of musicians who play together.

I hope this helps! Let me know if you have any other questions.