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Suppose classes C and D exist. A D object contains one instance variable which is an instance of class C. If we were modeling these

Suppose classes C and D exist. A D object contains one instance variable which is an instance of class C. If we were modeling these classes by drawing a UML class diagram, what type of relationship exists between C and D?

an aggregation relationship

a dependency relationship

a composition relationship

a generalization relationship

an inheritance relationsip

there is no relationship

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