There are four companies listed as good manufacturers of hard disc drives, and each of these companies manufacture two t

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There are four companies listed as good manufacturers of hard disc drives, and each of these companies manufacture two types of hard drives (i.e. hard drive type IDE or SATA).For a modeler, which modeling structure is reusable and easy to maintain?

A. Create a Model with the types of hard discs drive as Option Classes and the company names as Option Items.
B. Create a Model with four Option Classes with the company names and have the types of hard disc drives as Option Items.
C. Create two sub-models, one for the company and one for the hard disc drive. List the names of the companies and hard disc drive types as Option Items under them.
D. Create two Option Item Groups, one Option Item Groups for the company names and one Option Item Groups for hard disc types. Create them under a Model Group and attach them to a Model.