What is the function of DRX $($Discontinuous Reception$)$ in $5$G networks?A$)$ DRX increases power consumption by keeping the receiver active at all times.B$)$ DRX reduces power consumption by turning off the receiver during inactivity and only monitoring for downlink control signals when active.C$)$ DRX allows the device to transmit continuously, improving the battery life.D$)$ DRX increases coverage by maintaining constant monitoring of the downlink control signals.