Answer:
Install Team Viewer on the server ( A )
Step-by-step explanation:
Team viewer is a software used for web conferencing , file transfer, desktop sharing and online meetings it is used to regulate and monitor activities been done by remote workers. The functionality of online meeting and desktop sharing and web conferencing that comes with installing a Team viewer will enable the local user see everything that a remote contractor will be doing in real time
RDP ( remote desktop protocol ) which is a protocol mainly for redirecting audio and file redirection but cannot redirect VIDEO which is where user can see what a remote contractor is doing. but it can also be used for remote connections and transfer of Data between workers
A VPN connection lacks these functionalities it only encrypts and decrypts data