“Their reasoning is sound, I must admit.”

Which of the following best defines the bold phrase?

It is based on evidence from different sources.

It includes an explanation of the author's opinion.

It highlights the most important parts of the author's argument.

It is thought out and convincing.

The phrase "Their reasoning is sound" means that their logic or thinking is well thought out and convincing. It suggests that their argument is strong and well-supported. Therefore, the best definition for the bold phrase is: "It is thought out and convincing."

The correct definition is: It is thought out and convincing.

Well, their reasoning being sound means that it is thought out and convincing. So I guess the best definition would be that it is thought out and convincing. Keep up the good reasoning!