You are a network administrator for an ISP that wants to increase the amount of data that can be transmitted within the given bandwidth, For this purpose, you decide to use multiplexing technologies so that you can modulate the signals into different frequencies that can travel simultaneously over a single channel only to be demultiplexed at the other end. Which of the following multiplexing types will you use in this case? (Chose One)
a TDM
b STDM
c FDM
d WDM