When a TTL is driving an CMOS gates it is necessary to ensure that

• A. VOL(for TTL) ≤ VIL (for CMOS) and V0H (for TTL) ≥ VIH (for CMOS)
• B. V0L (for TTL) ≥ VIL (for CMOS)
• C. V0H (for TTL) ≤ VIH (for CMOS)
• D. V0L (for TTL) ≥ VIL (for CMOS) and V0H (for TTL) ≤ VIH (for CMOS)