What is one of the benefits of using DTOs in Sitecore applications?

Using Data Transfer Objects (DTOs) in Sitecore applications brings the benefit of reduced network traffic through efficient data transfer. DTOs are specifically designed to carry data between processes, minimizing the number of calls made over the network. By aggregating data into these structured objects, developers can efficiently pack and send only the necessary information needed for specific operations. This helps in optimizing performance, as it reduces the amount of data transmitted, which is especially important in environments with limited bandwidth or high latency.

In contrast, other options either suggest complications or irrelevant aspects of application development. For instance, while development may become more streamlined due to the structured approach of DTOs, efficiency gained is a more direct result of reduced data transfer rather than a broad reduction in coding effort. Similarly, complexity in data management does not align with the clarity that DTOs can bring, and enhanced user interface design is generally more about front-end concerns rather than the backend data handling facilitated by DTOs. Thus, the direct advantage of DTOs in minimizing network loads makes choice B the clear benefit.