Consider routing table of an organization's router shown below:\[\begin{array}{|c|c|c|} \hline \textbf{Subnet Number} & \textbf{Subnet Mask} & \textbf{Next Hop} \\ \hline \text{12.20.164.0} & \text{255.255.252.0} & \text{R1} \\ \hline \text{12.20.170.0} & \text{255.255.254.0} & \text{R2} \\ \hline \text{12.20.168.0} & \text{255.255.254.0} & \text{Interface 0} \\ \hline \text{12.20.166.0} & \text{255.255.254.0} & \text{Interface 1} \\ \hline \text{default} & \text{R3} \\ \hline \end{array}\]Which of the following prefixes in CIDR notation can be collectively used to correctly aggregate all of the subnets in the routing table?