In the Following Proof, Which Justification Is Correct for Line

Multiple Choice

In the following proof, which justification is correct for line 3? $\begin{array}{llcc} \text { (1) \( (\exists x) \mathrm{Q} x \) } & \text {\(/[(\exists x) \mathrm{Q} x \cdot \sim(\exists x) \mathrm{Q} x] \supset(\exists x) \mathrm{Q} x\) } & \text {Premise/Conclusion } \\ \text {(2) \( (\exists x) \mathrm{Q} x \cdot \sim(\exists x) \mathrm{Q} x \) } && \text { Assumption } \\ \text { (3) \( (\exists x) Q x \) } &\\\end{array}$

A) 1 Taut
B) 2 CP
C) 2 Simp
D) 2 RA
E) None of these answers are correct.