A) \[|{{a}_{1}}+2{{a}_{2}}+3{{a}_{3}}+...+n{{a}_{n}}|\le 1\]
B) \[|{{a}_{1}}+2{{a}_{2}}+3{{a}_{3}}+...+n{{a}_{n}}|\ge 1\]
C) \[|{{a}_{1}}+2{{a}_{2}}+3{{a}_{3}}+...+n{{a}_{n}}|\ge 0\]
D) \[|{{a}_{1}}+2{{a}_{2}}+3{{a}_{3}}+...+n{{a}_{n}}|\le 0\]
Correct Answer: A
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