In the Reaction Zn(s) + Cu(NO₃)₂(aq) $\rightarrow$ Zn(NO₃)₂(aq) + Cu(s), Identify the Oxidizing Agent

In the reaction Zn(s) + Cu(NO₃) ₂(aq) $\rightarrow$ Zn(NO₃) ₂(aq) + Cu(s) , identify the oxidizing agent.

A) Cu
B) Cu(NO₃) ₂
C) O₃
D) Zn
E) Zn(NO₃) ₂