In the Following Proof, Which Justification Is Correct for Line

Multiple Choice

In the following proof, which justification is correct for line 5? $\begin{array}{llcc} \text {(1) \( (y) (\mathrm{G} y \supset \mathrm{Hy}) \) } &&\text { Premise } \\ \text { (2) \( \sim[(\exists z) \mathrm{Hz} \vee(\exists z) \mathrm{I}] \) } &\text {\(/ \sim(\exists x) \mathrm{G} x\) } &\text {Premise/Conclusion } \\ \text { (3) \( (\exists x) \mathrm{G} x \) } &&\text {Assumption } \\ \text { (4) \( \mathrm{Ga} \) } &&\text { \( 3 \mathrm{EI} \) } \\ \text { (5) \( \mathrm{Ga} \supset \mathrm{Ha} \) } &\\\end{array}$

A) Assumption
B) 3 EI
C) 1 UI
D) 4 Add
E) None of these answers are correct.