jim and jon have some blueberries and blackberries. jim is willing to trade one blueberry for three blackberries. jon is willing to trade one blueberry for one blackberry. jim currently has all of the blackberries. so:

A.the current allocation is pareto efficient

B.there are gains from trade possible

C.there is not enough information to tell

D.it would make both jim and jon better off if jim trade jon some of his blackberries for more blueberries