Select the correct statement(s) regarA virtual circuit enables the sharing of physical links by numerous users. Time division multiplexing (TDM) and packet switching techniques are ways in which virtual circuits can be created. True Falseding signal transmission capacity (bps), attenuation, and frequency. a. increasing frequency bandwidth increases capacity (bps) b. increasing frequency bandwidth increase capacity (bps) c. increasing transmission frequency increase signal attenuation over distance d. all statements above are correct