Which choice correctly describes a characteristic of an electromagnetic wave?

a)An electromagnetic wave moves at the speed of sound.
b)An electromagnetic wave in a vacuum moves slightly slower than the speed of light in a vacuum.
c)An electromagnetic wave in a vacuum moves at the speed of light in a vacuum.
d)An electromagnetic wave in a vacuum moves faster than the speed of light in a vacuum.

I'm leaning towards C. I honestly don't know, I am sorry.

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  1. Yeah, it is C

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  2. Thank you, Random!

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