What is the correct process to simplify StartFraction x Superscript 7 Over x cubed EndFraction

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Part 1
Choose the correct answer below.
A.
Keep the base and subtract the exponents.
B.
Keep the base and multiply the exponents.
C.
Double the base and multiply the exponents.
D.
Keep the base and add the exponents.

B. Keep the base and subtract the exponents.