Further down the page, we see a link to a file that was uploaded into the course. This file is called Ocean Salinity.rtf:
Blackboard is in the process of storing this file. However, Blackboard doesn't have an editor or special player for RTF files, that is, it doesn't know what to do with an RTF file. So when the student clicks on this file, Blackboard will not attempt to open it. Instead, the student's browser will "decide" what to do with the file. Depending upon the settings in the student's browser, the file might open in the student's browser, or the browser will ask the student whether to open or save the file, or the file might open in the student's word processor. When you serve a file to the student, you don't have complete control over how that student's computer will handle the file.