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Which of the following series are convergent?

I.$\quad 1+\frac { 1 }{ 2 } +\frac { 1 }{ 3 } +\frac { 1 }{ 4 } +...+\frac { 1 }{ n } +...$

II.$\quad 1+\frac { 1 }{ { 2 }^{ 3 } } +\frac { 1 }{ { 3 }^{ 3 } } +\frac { 1 }{ { 4 }^{ 3 } } +...+\frac { 1 }{ { n }^{ 3 } } +...\\\ $

III.$\quad 1-\frac { 1 }{ { 2 }^{ 2 } } +\frac { 1 }{ { 3 }^{ 2 } } -\frac { 1 }{ { 4 }^{ 2 } } +...+{ \left( -1 \right) }^{ n+1 }\frac { 1 }{ { n }^{ 2 } }+... $

A

I only.

B

II only.

C

I and III only.

D

II and III only.

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