Consider a message signal whose spectrum is given by $$M\left( f \right) = 1 - \frac{{\left| f \right|}}{{{{10}^4}}},\,\left| f \right| \leqslant {10^4}$$     and zero elsewhere. The message signal amplitude modulates a carrier f_c = 1 MHz. The bandwidth of the modulated signal is:

A. True B. False

A. Space diversity B. Frequency diversity C. Broad band antenna D. Directional antenna

A. A double-tuned amplifier B. A high gain D.C. amplifier C. A cathode follower stage D. None of the above

A. Filter method B. Phase cancellation method C. Good attenuation characteristics D. All of the above