Determine Whether the Given Argument Is Valid or Invalid

determine whether the given argument is valid or invalid. If it is invalid, select a counterexample.
-1. (∃x) [(Dx • Ex) • Fx]
2) (∀x) [(Dx • Fx) ⊃ ∼Gx] / (∃x) (Ex • ∼Gx)

A) Valid
B) Invalid. Counterexample in a domain of 1 member, in which:
Da: True Ea: True Fa: True Ga: True
C) Invalid. Counterexample in a domain of 1 member, in which:
Da: True Ea: True Fa: True Ga: False
D) Invalid. Counterexample in a domain of 1 member, in which:
Da: True Ea: True Fa: False Ga: True
E) Invalid. Counterexample in a domain of 1 member, in which:
Da: False Ea: True Fa: True Ga: True

Correct Answer:

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