G ? ?T $\frac { \sim \mathrm { T } } { \mathrm { G } }$

G ? ?T $\frac { \sim \mathrm { T } } { \mathrm { G } }$

A) Invalid.
B) Disjunctive syllogism.
C) Modus ponens.
D) Affirming the consequent.
E) Modus tollens.