S ? ?R $\frac { \mathrm { N } \supset \sim \mathrm { R } } { \mathrm { S } \supset \mathrm { N } }$

Multiple Choice

S ? ?R $\frac { \mathrm { N } \supset \sim \mathrm { R } } { \mathrm { S } \supset \mathrm { N } }$

A) Disjunctive syllogism.
B) Constructive dilemma.
C) Pure hypothetical syllogism.
D) Affirming the consequent.
E) Invalid.