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) \( (x) (\mathrm{U} x \supset \mathrm{T} x) \) } & \text { \(/(\exists x) (U x \supset T x) \) }& \text {Premise/Conclusion } \\ \text {(2) \( \mathrm{Ua} \supset \mathrm{Ta} \) } && \text { \(1 \mathrm{UI}\) }\\ \text {(3) \( (\exists x) (\mathrm{U} x \supset \mathrm{T} x) \) } &\\\end{array}$

A) 2 QN
B) 2 EG
C) 2 EI
D) 2 Add
E) None of these answers are correct.