| As shown in figure "B" in the illustrated block diagram of a central operating system configured for supervisory control, what is the function of the block "ANALOG (A-D MUX)"? |
| A) A high speed solid- state switching device called a multiplexer capable scanning a large number of analog sensors in a short period of time and converting these signals to digital values for processing by the CPU. |
| B) A high speed solid-state switching device called a multiplexer capable scanning a large number of digital sensors in a short period of time and converting these signals to analog values for processing by the CPU. |
| C) A low speed solid-state switching device called a multiplexer capable scanning a small number of analog sensors in a long period of time and converting these signals to digital values for processing by the CPU. |
| D) A low speed solid-state switching device called a multiplexer capable scanning a small number of digital sensors in a long period of time and converting these signals to analog values for processing by the CPU. |
