Rationale: A. Pink coloration at the incision site is a normal finding during healing and not a sign of infection. B. A temperature of 37.2°C (99°F) is within the normal range and does not indicate infection. C. Swelling that extends significantly (3.8 cm) from the incision suggests inflammation beyond the expected surgical response, which is a strong indication of infection. D. Crusting along the incision line is a normal part of wound healing and not necessarily an indication of infection.