What is the meaning of the subsets constraint in the diagram?

Question

Exhibit

Options

• AD is a subclass of B.
• BD contains a subset of instances of C.
• CThe collection of b is a subset of the collection of d for each A.
• DThe collection of d is a subset of the collection of b for each C.
• EThe collection of c is a subset of the collection of b for each D.

• A
  7% (4)
• B
  15% (9)
• C
  2% (1)
• D
  71% (42)
• E
  5% (3)

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