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) \( \mathrm{Ca} \supset(x) (\mathrm{D} x \supset \mathrm{E} x) \) } && \text { Premise } \\ \text { (2) \( \mathrm{Da} \cdot \mathrm{Ca} \) } & \text {\(/ \mathrm{Ea}\) } & \text {\quad\quad \quad\quad \quad\quad Premise/Conclusion } \\ \text {(3) \( \mathrm{Ca} \) } &\\\end{array}$

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