Write out the sum.
A. 13 + 17 +21+ ... + (4n + 9)
B. 9 + 13 + 17 + ... + (4n + 5)
C. 9 + 13 + 17 + ... + (4n + 9)
D. 13 + 17 + 21 + ... + (4n + 5)
Answer: B
Mathematics
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B. 
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