Answer:
Computer Engineering
Step-by-step explanation:
Network systems refers to critical infrastructures comprising of hardware & software components from which networks are built. It is a concept & technology evolved in the field of computer sciences.
Communications refer to a field in the arts that deal with conveying information or message(s) from one entity to another. Liberal arts refers to the broad category of the traditional educational system of the western world which consists of the natural science, social sciences, arts & humanities. Business management refers to a field in the social sciences that deals with the efficient running & management of business operations. Computer engineering is a subcategory under the field of engineering that combines the computer sciences together with the field of electronic engineering to produce computer hardware & software solutions.
As such, in order to fulfill his desire of working in the field of network systems, Smith majoring in computer engineering will give him the best chance of that happening