Which of the Following Best Defines Craniosynostosis

Which of the following best defines craniosynostosis?

A) premature ossification of suture lines resulting in early fusion of the bones of the skull
B) sinus openings into the cranium allowing for changes in intracranial pressure
C) wider spaces than normal between the bones of the cranium
D) changes in the size and shape of the skull due to the absence of lymph and sinus openings