(Q ? E) • (D ? ?E) $\frac{\mathrm{EV} \sim \mathrm{E}}{\sim \mathrm{Q} \vee \sim \mathrm{D}}$

Multiple Choice

(Q ? E) • (D ? ?E) $\frac{\mathrm{EV} \sim \mathrm{E}}{\sim \mathrm{Q} \vee \sim \mathrm{D}}$

A) CD-valid.
B) Invalid.
C) DD-valid.
D) MT-valid.
E) CD-invalid.