The Boolean expression $$\left( {{\text{X}} + {\text{Y}}} \right)\left( {{\text{X}} + \overline {\text{Y}} } \right) + \overline {\left( {\overline {\text{X}} \overline {\text{Y}} } \right) + \overline {\text{X}} } $$       simplifies to

A. 2TTL B. 5TTL C. 8TTL D. 10TTL

A. NAND gate B. OR gate C. AND gate D. None of the above

A. 6 B. 32 C. 64 D. 128

A. Base 10 B. Base 16 C. Base 8 D. Base 3