Final answer:
Signs of possible infection in a patient with staples, aside from reddened tissue and open areas between the staples, include warmth, edema, and hardness, as well as drainage from the wound.
Step-by-step explanation:
In a patient with staples, signs of possible infection in addition to reddened tissue and open areas between the staples include warmth, edema, and hardness (option a), as well as drainage from the wound (option d). These signs indicate that the infection has spread and is causing inflammation and fluid accumulation. Limited mobility-related pressure ulcers (option c) are not specific to infection and can occur due to prolonged pressure on the skin.