What options do you have to handle orphan nodes in your hierarchy? Note: There are 2 correct answers to this question.

What options do you have to handle orphan nodes in your hierarchy? Note: There are 2 correct answers to this question.
A . Define an expression to determine a parent.
B . Generate additional root nodes.
C . Assign them to a level below the root.
D . Assign them to a node at the root level.

Answer: B,C