Posttraumatic Hydrocephalus Is Most Often Caused by Which of the Following

Posttraumatic hydrocephalus is most often caused by which of the following?

A) Hypersecretion of cerebrospinal fluid
B) Obstruction of the aqueduct
C) Obstruction of the foramen of Luschka
D) Obstruction of the foramen of Magendie
E) Obstruction of cerebrospinal fluid absorption