A linear delta modulator is designed to operate on speech signals limited to 3.4 kHz. The sampling rate is 10 time the Nyquist rate of the speech signal. The step size = 0 62 is 100 mV. The modulator is tested with a 1 kHz sinusoidal signal. The maximum amplitude of this test signal required to avoid slope overload is

• A. 2.04 V
• B. 1.08 V
• C. 4.08 V
• D. 2.16 V