The answer would be A.
The question you have to ask is, is it possessive?
Yes it is possessive.
The wing is owned by the bird. Its wing was broken.
It's means it is or it has.
It's would not make sense in this case because you can not put it is or it has into this sentence.
The poem "Ozymandias" written by Percy Busshe speaks in a traditional, simple manner how much the human aspiration to their power and material achievements and wealth provides for themselves an eternity. Thinking that their material, earthly power is immortal, tells how much they cheat themselves, in the inability to understand what is eternal. Even the Ozymandias's statue, which is material and transient, is decaying, more durable than them.
The answer is: C.
How we are inherently clumsy
