In which stage of the design process does the designer analyze problems in the design and try to fix them? a. research problemb. designing a solutionc. build the prototyped. troubleshoot and designing

B, they analyse any faults in the product to try and make a better final design which will then be built

A  documentary film  is a nonfictional motion picture intended to document some aspect of reality, primarily for the purposes of instruction, education, or maintaining a historical record.example:     20,000 days on earth