If \(S\) is the sum of the first \(n\) positive integers, what is the value of \(n ?\)

[Vincen]

If \(S\) is the sum of the first \(n\) positive integers, what is the value of \(n ?\)

(1) \(S < 20\)
(2) \(S^2 > 220\)

Answer: C

Source: GMAT Paper Tests