Final answer:
The likely outcome for a weather app using a learning algorithm is to collect location data every time the app is opened and potentially learn where a user lives and works.
Step-by-step explanation:
The likely outcome for a weather app using a learning algorithm to determine where to put future weather stations would be option C: collecting location data every time the app is opened, potentially learning where a user lives, works, etc. This approach allows the app to gather data on the user's location and track patterns over time, which can provide valuable insights for determining optimal weather station placement. By collecting location data, the app can learn about different microclimates and weather patterns in various areas, improving the accuracy of its weather forecasts.