Answer:
A. Microsoft Office Remote Code Execution
Explanation:
From the given options, we have;
The web server having a SQL injection is infrequently use
The information on the website having SSL/TLS not used is promotional
The location of the server having a TLS downgrade is on a development network
The location of the Microsoft Office Remote Code Execution is on a human resource system test server
Therefore, given that the test server, is the deployment source of the main server, and that with a Remote Code Execution, RCE, cyber attack, the attacker is able to make commands work on other computers, the RCE attack on the test server is a potential access of an attack on the main servers, and should be patched first.