Which of the following is a benefit of dependent drop-downs?

Dependent drop-downs are designed to improve user experience by ensuring that users are presented with relevant choices based on their previous selections. When a user selects an option in one drop-down menu, the subsequent drop-down menus update to only display options that are logically related or valid according to that selection. This functionality significantly reduces the likelihood of user error, as it prevents users from selecting inappropriate or irrelevant options that may not apply to their original choice. By filtering the presented options, dependent drop-downs streamline the data entry process and lead to higher accuracy in form submissions.

The other choices do not align with the primary benefits of dependent drop-downs. While increasing the number of selections or enhancing aesthetic appeal might contribute to user experience in some contexts, they do not encapsulate the main advantage of reducing user error. Integrating external data sources is also unrelated to the fundamental purpose of dependent drop-downs, which is focused more on guiding user input within the application itself.