Final answer:
Whenever people cry, their nose runs because tears are drained into the nose through the nasolacrimal ducts.
Step-by-step explanation:
The correct answer is A. nasolacrimal ducts.
Whenever people cry, their nose runs because tears are drained into the nose through the nasolacrimal ducts. These ducts are located underneath the skin and pass through the bones of the face into the nose.
For example, tears produced by the lacrimal gland above the eye flow through the lacrimal puncta, then through the lacrimal ducts, and finally into the nasolacrimal ducts, which empty into the nasal cavity.