If the law of increasing opportunity costs is operable, and currently the opportunity cost of producing the 101st unit of good X is 5Y, then the opportunity cost of producing the 201st unit of good is X is most likely to be
a.less than 5Y.
b.more than 1/5Y but less than 5Y.
c.more than 5Y
d.less than 1/5Y but more than zero.
e.none of the above