附加2 Which two statements are true about selecting related rows from two tables based on an Entity Relationship Diagram (ER
D:?
选项：

A: Rows from unrelated tables cannot be joined.
B: Implementing a relationship between two tables might require joining additional tables.
C: Relating data from a table with data from the same table is implemented with a self join.
D: Every relationship between the two tables must be implemented in a join condition.
E: An inner join relates rows within the same table.