Comp TIA Security + Certification Questions Part 4

A cybersecurity analyst is looking into the payload of a random packet capture file that was selected for analysis. The analyst notices that an internal host had a socket established with another internal host over a non-standard port.
Upon investigation, the origin host that initiated the socket shows this output:
udera@host>history
$$mkdir /local/usr/bin/somedirectory
$$nc -1 192.168.5.1 -p 9856
$$ping -c 30 8.8.8.8 -s 600
$$rm -rm /etc/dir2/somefile
$$rm -rm /etc/dir2/
$$traceroute 8.8.8.8
$$pskill pid 9487
usera@host>
Given the above output, which of the following commands would have established the questionable socket?