The Family of an Elderly Patient, Diagnosed with Pulmonary Edema

The family of an elderly patient, diagnosed with pulmonary edema, asks the nurse what the diagnosis means. With which of the following should the nurse respond?

A) "It is too much fluid in the lungs."
B) "It is a narrowing of the coronary vessels that causes the heart to stop working correctly."
C) "It rarely affects individuals older than 60."
D) "It is caused by a person's excessive working when they were younger."