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

Choice A reason: This describes exertional dyspnea, which may be related to heart failure or pulmonary disease but does not specifically indicate orthopnea. Choice B reason: Frequent wheezing suggests airway hyperreactivity, such as asthma or COPD, but is not a hallmark of orthopnea. Choice C reason: Using multiple pillows to sleep is a classic subjective indicator of orthopnea, as elevating the head reduces pulmonary congestion and improves breathing in conditions like heart failure. Choice D reason: Nocturnal coughing may be seen in asthma, GERD, or postnasal drip, but it does not specifically indicate orthopnea.