Q. he problem of the VOH(min) of a TTL IC being too low to drive a CMOS circuit and meet the CMOS requirement of VIH(min) is usually easily overcome by:

• (A) adding a fixed voltage- divider bias resistive network at the output of the ttl device
• (B) avoiding this condition and only using ttl to drive ttl
• (C) adding an external pull- down resistor to ground
• (D) adding an external pull-up resistor to vcc