Final answer:
The best way to improve critical thinking for a nursing student is through active participation in case studies and problem-solving activities.
Step-by-step explanation:
The best response by the faculty to improve critical thinking for a nursing student would be to encourage active participation in case studies and problem-solving activities (option a). This approach allows students to engage with real-life scenarios and apply their critical thinking skills to find solutions. By actively participating in these activities, students can develop their analytical and problem-solving abilities, which are essential for effective critical thinking in the nursing field.