When applying the M$-$M relationship rule for converting an ERD into a relational table design, which of the following statements is true?

Group of answer choices

Each M$-$N relationship becomes a separate table.

The primary key of the table is the primary key of the entity type participating in the M$-$N relationship which has the most attributes.

The primary key of the table is a combined key consisting of the primary keys of the entity types participating in the M$-$N relationship.

a and c$.$