You are required to design an application that organizes people residing (utc) in buildings. The application has a number of buildings, in each building there are apartments (Gew), and each apartment has a family residing in it. Which object-oriented programming concept is used to model the relationship between buildings and apartments, and between apartments and families? Select one: O a. Abstraction O b. Inheritance O c. Composition O d. Encapsulation O e. Polymorphism