John can produce 6 tents or 12 sleeping bags per month. Jane can produce 4 tents or 12 sleeping bags per month. If John and Jane specialize and trade according to comparative advantage, which of the potential trades. below would make them both better off? 

a. John will trade away sleeping bags for tents.

b. Jane will trade away tents for sleeping bags.

c. Jane will trade away sleeping bags for tents.

d. John will trade away tents for sleeping bags. 

e. Both A and B

f. Both C and D

g. None of the above because John can produce more tents and the same amount of sleeping bags as Jane.