The correct option is C Proud of his work
The narrator of the poem is indeed proud of his work. He is aware of his place in the world and of what he can contribute to be part of it. He knows how his work is, what his status is, but he is also aware that he survives the world by himself, and he is proud of that. He is content with whatever little he can do and offer. option C is the correct answer. The statements of options A,B,D and E are not supported by the text and are incorrect.