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Let Sndenote the sum of the cubes of the...

Let `S_n`denote the sum of the cubes of the first n natural numbers and `s_n` denote the sum of the first n natural numbers. Then, `sum_(r=1)^n(S_r)/(8_r)` is equal to

A

`(n(n+1)(n+2))/6`

B

`(n(n+1))/2`

C

`(n^2+3n+2)/2`

D

None of these

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The correct Answer is:
A
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