根据短文和图表内容，选择最佳答案。

In order to provide nicer service for the residents（居民）, Xingfu Community made surveys among 800 residents who lived here. The surveys were mainly about the residents' favorite community activities. It took the staff lots of time and effort to make the surveys. The residents were surveyed in four ways: talking on the phone, answering questions online, communicating face to face and sending letters to the community. Most of the residents were surveyed by answering questions online. Here are the diagrams（图表）showing the results.

After the two surveys above and other surveys, the staff of Xingfu Community improved the service that the residents were not satisfied with. They also provided more kinds of activities for the residents.