Production Possibilities Data for Gamma and Sigma

Production possibilities data for Gamma and Sigma.All data are in tons.
Gamma production possibilities:
Sigma production possibilities:

-Refer to the above data.What are the limits of the terms of trade between Gamma and Sigma?

A) 1 tea = 2 pots to 1 tea = 6 pots
B) 1 tea = 3 pots to 1 tea = 6 pots
C) 1 tea = 2 pots to 1 tea = 3.5 pots
D) 1 tea = 1 pot to 1 tea = 3 pots