Select the correct answer.
Which event is used in "How Arthur was chosen king" to develop a theme about family that differs from themes in "How Theseus Lifted the Stone"?

A.
Arthur's father and brother kneel before him.
B.
Arthur finds out that Sir Ector is not his father.
C.
Arthur cannot retrieve his brother's sword.
D.
The lords are upset that Arthur is not of high blood.