Analyze the following statement, and then choose one of the options that you think is best to use in academic writing:The coastal urban areas development orientation has been investigated in five coastal cities.

A、We investigated the developmental orientation of urban communities in five coastal cities. ;
B、The orientation of coastal urban areas development has been put under investigation in five coastal cities.;
C、Here, an investigation into costal urban areas development orientation in five coastal cities is presented.;
D、There is an investigation into coastal urban areas development orientation presented here in five coastal cities.