Answer:
The correct answer is: "C. He has a deep understanding of network systems, is a problem solver who can make decisions on his own, and stays focused when working alone".
Step-by-step explanation:
All other options are lacking in some, whether because they are incomplete, or for they are not important for the task the firm has to do. As it is a software firm and it must finish a new project in a short period of time, then it is more interesting and demanding to have in charge someone who already knows a lot of operating systems and who is also a great decision maker, while working by his/her own. These features are more important than being creative or communicative, for example.