Correct Answer: Speaking in a confusing manner without giving a correct answer.

Solution : The correct choice is the third option .

The expression "beating about the bush" means to avoid answering a question directly or to evade providing specific details or information about a topic.

In this context, when the District Attorney questioned the convict about the details of the day of the crime, the convict didn't give a straightforward or clear answer. Instead, he evaded the question or spoke vaguely, not addressing the topic directly or avoiding providing the requested information.

Therefore, the most appropriate meaning is speaking in a confusing manner without giving the correct answer.