The correct option is A A verbal exchange can establish a binding contract.
"For the reader armed with these data, the story becomes more accessible as a lesson in contract law, with several additional minor themes. A culturally attuned listener would notice, for instance, that when the porcupine woman proposed passage to the beaver, he agreed without any stipulations or clarifications of the terms. He gave a basically open-ended agreement made a contract and hence the porcupine woman was perfectly within her rights both in demanding that he return three times and in quilling him to death when he reneged." - in this extract, "these data" refers to the knowledge of cultural symbols of the Tanaina people and their importance within the folk tale. In this given context, we can conclude insight offered by the author's analysis is that a verbal exchange can establish a binding contract in Tanaina beliefs. Thus B is the answer.