If George trades his $40 for Ian's book, we can surmise that
a.he expects to get greater utility from $40 than from the book.
b.he expects to get greater utility from the book than from $40.
c.he expects to get the same utility from the book as from $40.
d.he expects to get less utility from the book than from $40.
e.he expects to get twice the utility from the book than from $40.