Answer:
A subset is a set whose elements are all members of another set. The symbol "⊆" means "is a subset of". The symbol "⊂" means "is a proper subset of". Since all of the members of set A are members of set D, A is a subset of D.
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Answer:
A subset is a set whose elements are all members of another set. The symbol "⊆" means "is a subset of". The symbol "⊂" means "is a proper subset of". Since all of the members of set A are members of set D, A is a subset of D.