You receive an e-mail with an attachment that has become corrupted. When you try to open it, you see a pop-up message giving you some information about what is wrong with the file and what you can do about it. Which principle of HCT does this situation illustrate?

The pop-up tells you what went wrong with the attachment and suggests what to do next. In human-computer interaction, feedback is information the system gives users about the results or status of their actions. This illustrates feedback, not simplicity or reuse.

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