Which of these statements is false?

• A. The open loop gain AOL(f) dB is approximately constant from 0Hz to fo
• B. When input signal frequency and f is equal to break frequency fo, the gain frequency is called -3dB frequency
• C. The open loop gain AOL(f) dB is approximately constant upto break frequency fo, but there after it increase 20dB each time there is a tenfold increase in frequency.
• D. At unity gain crossover frequency, the open loop gain AOL(f) dB is zero