All of the following bones contain paranasal sinuses except

A) the maxilla.
B) the mandible.
C) the ethmoid bone.
D) the sphenoid bone.
E) All of these bones contain paranasal sinuses.

Which statement is true regarding aging?

A) Genetics may partially determine how long a person lives.
B) DNA mutations accumulate as the body ages.
C) Lack of calcium in a person's diet may lead to bone loss.
D) Some proteins become cross-linked and reduce organ function.
E) All of the answer choices are true statements about aging.