Final answer:
Residents who are restrained are at greater risk of developing pressure sores due to periods of immobility which reduce blood flow to the skin and underlying tissues, potentially leading to tissue death.
Step-by-step explanation:
The true statement about residents who are restrained is that A) They are at greater risk for developing pressure sores. Being restrained often leads to prolonged periods of immobility which can cause pressure sores, also known as bedsores or decubitus ulcers. These sores occur due to constant, unrelieved pressure on certain body parts, typically where bones are close to the skin, resulting in reduced blood flow and tissue necrosis. It is essential for health care facilities to implement measures such as repositioning patients regularly to minimize this risk.
On the contrary, restraints do not necessarily improve posture and alignment (Statement C), nor do they decrease the risk of falling, as restrained residents can still experience falls (Statement D). Moreover, prolonged immobility can actually increase the risk of pneumonia due to poor air exchange (Statement B).