Digital signals (i) do not provide a continuous set of values (ii) represent values as discrete steps. (iii) can utilize only binary system, and (iv) can utilize decimal as well as binary system. Which of the following options is True

Options

A. Only (i) and (ii)
B. Only (ii) adn (iii)
C. Only (i) (ii) and (iii) but not (iv)
D. All the above (i) to (iv)