Question: What is the reason for using Concerns in Rails?

1. Concerns allow modularity and code reuse in models, controllers, and other classes.
2. Concerns are used to separate class methods from models.
3. Concerns are used to increase security of Rails applications.
4. Concerns are used to refactor Rails views.

Answer: The correct answer of the above question is Option A:Concerns allow modularity and code reuse in models, controllers, and other classes.