Select a Counterexample for the Given Invalid Argument

Multiple Choice

select a counterexample for the given invalid argument.
-1. (∃x) (∼Ax ≡ Cx)
2) (∃x) (Ax • Cx)
3) (∀x) (Bx ⊃ Ax) / (∀x) (Cx ⊃ Bx)

A) Counterexample in a domain of 2 members, in which: Aa: True Ba: False Ca: True
Ab: True Bb: True Cb: False
B) Counterexample in a domain of 2 members, in which: Aa: False Ba: False Ca: True
Ab: True Bb: True Cb: False
C) Counterexample in a domain of 2 members, in which: Aa: True Ba: True Ca: True
Ab: True Bb: True Cb: False
D) Counterexample in a domain of 2 members, in which: Aa: True Ba: False Ca: True
Ab: False Bb: True Cb: False
E) Counterexample in a domain of 2 members, in which: Aa: True Ba: False Ca: True
Ab: True Bb: False Cb: True