Which Rule Is Used in the Following Inference A)HS
B)MP
C)MT
D)CD
E)DD

Multiple Choice

Which rule is used in the following inference? $$\begin{array} { l } \sim [ ( \mathrm { F } \vee \mathrm { G } ) \cdot \mathrm { H } ] \supset \sim ( \mathrm { I } \equiv \mathrm { J } ) \\\sim \sim ( \mathrm { I } \equiv \mathrm { J } ) \\\sim \sim [ \mathrm { F } \vee \mathrm { G } ) \cdot \mathrm { H } ]\end{array}$$

A) HS
B) MP
C) MT
D) CD
E) DD