Far Vision

I

If I have seen far than others, 

it was because I was standing 

on the shoulders of giants.

II

If I have seen less far than others, 

it was because giants 

were standing on my shoulders.

III

If I have seen far than others, 

it was because I was seeing 

between the shoulders of dwarfs. 

A.  Only I

B.  Only II

C.  Only III

D.  Only I & III

E.  Neither I, II, or III

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Acknowledgements: 

Isaac Newton, Albert Einstein,

Murray Gell-Mann, Sidney Coleman, 

Ian McEwan and other giants and dwarfs.