I believe the answer is a finished rocket. If it's a finished rocket then, how can you can you show how to build it if you've already made it?
a transparency showing al l the rockets NASA has built ;
The most inappropriate media for a presentation on how to build a rocket is option C, a transparency showing all the rockets NASA has built. This is because it does not demonstrate the process of building a rocket, which is the primary focus of the presentation. Options A, B, and D are more relevant as they provide direct guidance on rocket construction.
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