The correct answer is: A. with all their might.
The phrase “fight tooth and nail” means to fight with all one’s strength and determination. It is often used to describe a situation in which someone is fighting for something that is very important to them.
Option B is incorrect because it does not mean to fight with all one’s strength and determination. Option C is incorrect because it means to resort to violence, which is not necessarily the same as fighting with all one’s strength and determination. Option D is incorrect because it means to fight in a cowardly manner, which is also not necessarily the same as fighting with all one’s strength and determination.
Here are some examples of how the phrase “fight tooth and nail” can be used in a sentence:
- The soldiers fought tooth and nail to defend their homeland.
- The protesters fought tooth and nail for their rights.
- The couple fought tooth and nail to stay together.