What is the largest prime factor of 8,575? Explain why.

A. 343, since the prime factorization is 5(5)(343).
B. ?7, since the prime factorization is 5(5)(7)(7).
C. ?35, since the prime factorization is 5,5,7,7,7.
D. ?7, since the prime factorization is 5(5)(7)(7)(7).
E. 5, since the sum of the digits is divisible by 5.
F. ?none of the above, since the number is prime.


Answer: D

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