The answer is B.
For the Haida people, all of humanity came from a cockle shell, liberated by The Raven, who opened the shell. The first men and women, in the Haida tradition, came from a sea creature, meaning all men come from the sea, therefore they have a deep respect for the sea. Also, the Haida, being people who live in an archipelago, get most of their resources (and communicate) through the sea, so they think highly of it and respect it.
The answer is B: Less than a decade ago, the HSUS...an affiliate [Human Society International].
Brackets are used to give the writers (when they need to add information) an opportunity to add an explanation, or emphasis to a word, or change a <em>quote to fit to a sentence, but without changing the meaning of the text</em>. In A) <em>global work</em> doesn't need explanation; C) <em>decade</em> doesn't need explanation; D) <em>HSUS</em> was already explained in the first sentence of the text.
