5.1 When we convert an REA diagram (a conceptual model) into a relational database,

(a) We should implement all relationships, regardless of maximum cardinalities, by posting the pri- mary key of one entity into the other entity's table as a foreign key.

(b) We should implement a 1:1 (one-to-one) relationship with a separate table.

(c) We should implement a 1:N (one-to-many) relationship by posting the key of the many entity table into the one entity table.

(d) We should implement a 1:N (one-to-many) relationship by posting the key of the one entity table into the many entity table.