The mother of an 8-year-old boy tells the practical nurse (PN) that he fell out of a tree and hurt his arm and shoulder. Which assessment finding should the PN note as the most significant indicator of possible child abuse?

The mother refuses to answer questions about family history.

The child has several abrasions on the chest and legs.

The child looks at the floor when answering the nurse's questions.

The mother's version of the injury is different from the child's version.