Question: Consider the following Facebook ERD and ( note that this ERD might be incomplete or missing some annotations that you will answer ) Which one

Consider the following Facebook ERD and (note that this ERD might be incomplete or missing some annotations that you will answer )
Which one is true about Gender attribute in a Facebook User Entity?
Select one:
A. It is multivalued
B. Key Attribute
C. It can be considered as candidate key
D. It should have a value set (Domain) constraint
Consider the following Facebook ERD and (note that this ERD might

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