Harmony is a 4-year-old female who has been through several evaluations for behavioral abnormalities that have become increasingly disruptive, and the family is concerned for the safety of both Harmony and her 2-year-old brother. Comprehensive assessment of Harmony includes neuropsychiatric testing. The PMHNP documents the presence of neurological hard signs. These suggest:
A. Brain lesions
B. Early-onset schizophrenia
C. Low intelligence
D. Learning disability