In the story "the alchemist", why does the dream interpreter make the boy swear a second time while he was looking at an image of the sacred heart of jesus?

a. she was a christian who regarded the image as holy.
b. she perceived the importance that he placed on his own faith.
c. she superstitiously believed that god would bless the transaction.
d. she was especially distrustful of children who she believed were inclined to lie.