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Question 18 1 pts
Choose the answer that corrects the statement:
Visible light waves are at the upper end of the frequency spectrum, while x-ray waves fall at
the lower end.
O A. Change "visible light to "audible"
O B. Change "X-ray to "audible"
O C. Change "upper" to "lower"
O D. All of the above are correct

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Question 18 1 pts
Choose the answer that corrects the statement:
Visible light waves ar...
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