(L ? ?C) • (D ? ?Q) $\frac { \sim \mathrm { L } \vee \sim \mathrm { D } } { \mathrm { C } \vee \mathrm { Q } }$

question 11

Multiple Choice

(L ? ?C) • (D ? ?Q) $\frac { \sim \mathrm { L } \vee \sim \mathrm { D } } { \mathrm { C } \vee \mathrm { Q } }$

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

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