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None: Day 3-Segment 3-Quiz 2" is the 25th of a series that combine to form a DAHON Nano Course, entitled, "None. ". DAHON Nano Courses are Massive Open Offline App Courses (MOOAC) that run on mobile devices, e. G., Android and iOS, and do not require an internet connection. We build them using our open source tool, UsbongKit.