Which of the following is the correct way to simplify x cubed times x Superscript 4​?

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

The correct answer is D. Keep the base and multiply the exponents.