Refer to Scenario $16\mathrm{.}2.$ Is the current distribution Pareto optimal?

Question $15$ options:

A$)$

No$,$ as Sam could trade Sally a piece of candy for a tee shirt and both people would be better off.

B$)$

Yes.

C$)$

No$,$ as Sam could trade Sally a tee shirt for a piece of candy and both people would be better off.

D$)$

Without the prices of each commodity it is impossible to determine if this distribution is Pareto optimal.