Which subjective assessment data supports the nurse's conclusion that a client is experiencing orthopnea?

A. This statement could indicate exercise intolerance or shortness of breath with exertion, but it doesn't specifically relate to orthopnea. Orthopnea refers to difficulty breathing when lying flat, not with activity. B. This statement is indicative of orthopnea. People with orthopnea often need to sleep with multiple pillows or sit up to relieve the shortness of breath they experience when lying flat, often due to heart failure or other respiratory conditions. C. Nighttime coughing can be a symptom of various conditions, such as asthma or postnasal drip, but it is not specific to orthopnea. Orthopnea is more about difficulty breathing while lying down. D. Wheezing is a sign of asthma or other respiratory conditions but does not directly correlate with orthopnea. Orthopnea is specifically about the inability to breathe comfortably when lying down, not about wheezing.