Final answer:
The KP Health Ally app is the recommended app for Washington Kaiser Permanente members.
Step-by-step explanation:
The correct answer is b) The KP Health Ally app. Washington members of Kaiser Permanente should use the KP Health Ally app instead of the Kaiser Permanente app. This app provides access to various health management tools and features, allowing members to schedule appointments, view test results, message their doctors, and manage their health in a convenient and user-friendly way.