A relation is in Boyce$-$Codd Normal Form $($BCNF$)$ if and only if it is in $3NF$ and

A$)$ all non$-$key attributes are determined by the entire primary key

B$)$ there are no non$-$key attributes determined by another non$-$key attribute

C$)$ every attribute is a candidate key

D$)$ every candidate key is a determinant