In the Following Proof, Which Justification Is Correct for Line

question 142

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.

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