Suspected as double agents, three spies are arrested........and there is just one mole among the three, who is the mole?

Question

Suspected as double agents, three spies are arrested.

When questioned, there replies are as follows;

Alex: “Ben is a mole.”

Ben: “Cody is a mole.”

Cody: “Ben is lying.

Assuming that moles lie, other agents tell the truth, and there is just one mole among the three, who is the mole?

Answer 1

Ben is the mole