A 78-year-old man with a history of atrial fibrillation and type 2 diabetes is brought to the ED by his 50-year-old son, who cares for him at home. On assessment, the nurse notes that the client is dehydrated, unkempt, and has a stage 3 pressure ulcer on his coccyx. He is weak but otherwise neurologically intact. The nurse asks if the client is being well cared for at home, to which the client replies, "He does the best he can, I guess." Which of the following interpretations of the findings and the client's statement is the most likely explanation for the client's condition?
a. The client's age and weakness
b. Physical abuse
c. Physical neglect
d. The client's underlying physical condition