Boolean expression $$\overline {{\text{A}} + \overline {\text{B}} + {\text{C}}} + \overline {\overline {\text{A}} + \overline {\text{B}} + {\text{C}}} + \overline {{\text{A}} + \overline {\text{B}} + \overline {\text{C}} } + {\text{ABC}}$$         reduces 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