In Cases of Noncommunicating Hydrocephalus,why Does Excess Cerebrospinal Fluid Accumulate

Multiple Choice

In cases of noncommunicating hydrocephalus,why does excess cerebrospinal fluid accumulate?

A) Absorption of CSF through the arachnoid villi is impaired.
B) Excessive amounts of CSF are produced in the ventricles.
C) An obstruction is present in the aqueduct of Sylvius or other channel.
D) Flow around the spinal cord is blocked.