An advertiser targeting only France determines that clicks have been received from people in Switzerland. Why might this happen?

July 4, 2019 Certificate Land

People located in Switzerland are searching using France-related words, like “hotels in Paris”
Swiss people are searching on Google for information about Switzerland
People located in France are using Swiss-related words like “hotels in Switzerland”
French people visiting Switzerland are searching on Google for information about Switzerland

The correct answer is:

People located in Switzerland are searching using France-related words, like “hotels in Paris”.