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) \( \sim \mathrm{Ba} \) } & & \text { Premise} \\ \text { (2) \( (x) (\mathrm{C} x \vee \mathrm{B} x) \) }&/ \mathrm{Ca} & \text {Premise/Conclusion }\\ \text{ (3) \( \mathrm{Ca} \vee \mathrm{Ba} \) }&\\\end{array}$

A) 1 Add
B) 2 Simp
C) 1, 3 DS
D) 2 UI
E) None of these answers are correct.