Which statement about cerebral palsy would be accurate?

A. Cerebral palsy (CP) varies widely in severity; not all individuals experience many disabilities. B. CP is typically caused by decreased oxygen to the brain (hypoxia), not too much oxygen. C. CP is a non-progressive neurological disorder, meaning the brain injury does not worsen over time, although symptoms may change. D. CP is usually caused by brain injury before or during birth and is not typically inherited or familial.