Question: At the implementation level, the supertype and its subtype ( s ) maintain a ( n ) relationship. self - referencing 1 : 1 1

At the implementation level, the supertype and its subtype(s) maintain a(n) relationship.
self-referencing
1:1
1:M
M:N
At the implementation level, the supertype and its subtype(s) maintain a(n)

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