The Rule for Converting Conceptual Model Relationships with Maximum Participation

The rule for converting conceptual model relationships with maximum participation cardinalities of "many to many" into relational database tables is

A) Create a separate table identified by the key attribute of the entity that has the most instances.
B) Create a relation that can have no attributes of its own.
C) Post the key attribute of either entity into the relation of the other entity.
D) Post the key attribute of the table with mandatory participation into the table with optional participation.
E) Create a separate table identified by a concatenated primary key comprised of the key attributes from both entity tables.