Which is a benefit of using MHT format for email output?

Choosing the MHT (MHTML) format for email output primarily offers the benefit of reduced file size by avoiding duplication. MHT combines all components of a webpage (such as HTML, images, and other multimedia content) into a single file. This consolidation limits redundancy because all the necessary resources are packaged together rather than requiring separate files to be referenced or downloaded. This not only streamlines the email but also minimizes the overall file size, making it more efficient for storage and transfer.

The other options, while potentially appealing, do not reflect the core advantages of MHT. For example, while MHT can provide a standardized visual presentation, the primary focus is not on enhanced visual formatting. Similarly, although security features can be relevant in many formats, MHT is not specifically noted for enhanced security compared to other email formats. Lastly, conversion times can vary based on other factors and are not necessarily faster when using MHT. The consolidation inherent in MHT's approach is the key reason for reduced file size, making this the most compelling choice.