Final answer:
The most appropriate nurse response to a mother worried about her infant’s care is to acknowledge her concerns and invite her to discuss them, vividly exemplified by response option C, which encourages an open dialogue.
Step-by-step explanation:
The best response by the nurse, when a mother expresses concern about her infant not getting better and considering changing physicians, is option C: "You always have an option to change. Tell me about your concerns." This option is the most appropriate because it acknowledges the mother's concerns, demonstrates empathy, and encourages an open dialogue about her experiences and worries. It provides an opportunity for the nurse to understand the mother's perspective and to address any potential problems with the care being received.
Option A, B, and D are less suitable as they dismiss the mother's concerns and may make her feel as though her worries are not being taken seriously. A healthcare professional should always aim to listen and give patients or their guardians a space to voice their concerns without feeling judged or belittled.