Well books, videos and music can all be copyrighted (I believe) so the logical answer would be b. inventions. Hope this helps.
Answer:
commutative
Explanation:
The commutative property states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer.
Answer:
the galactic network.
have a nice day <3
Explanation:
increase power in the telephone industry. investigate technologies for the military in the US. he first idea for a communications network was called: the galactic network.
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Hope this helps.