In the Following Proof, Which Justification Is Correct for Line

Multiple Choice

In the following proof, which justification is correct for line 6? $\begin{array}{llcc} \text { (1) \( (z) (\mathrm{I} z \cdot \mathrm{Tz}) \) } && \text {Premise } \\ \text { (2) (?y) \( \mathrm{Iy} \supset(\exists z) \mathrm{Hz} \) } & \text { \(/(\exists z) \mathrm{T} z \cdot(\exists z) \mathrm{Hz}\) }& \text { Premise/Conclusion }\\ \text { (3) \( \mathrm{Ia} \cdot \mathrm{Ta} \) } &&1 \mathrm{UI} \\ \text { (4) \( \mathrm{Ia} \) } && 3 \mathrm{Simp}\\ \text { \(\text { (5) (?y) } I y\) } && 4 \mathrm{EG}\\ \text {(6) \( (\exists z) \mathrm{Hz} \) } &\\\end{array}$

A) 2, 5 MT
B) 3 EI
C) 2 DM
D) 2, 5 MP
E) None of these answers are correct.