Urban planners carry out projects to develop a city. They look at the needs of local people and the environment when they do this.

A. While carrying out projects to develop a city, urban planners look at the needs of local people and the environment when they do this.

B. While carrying out projects to develop a city, urban planners look at the needs of local people and the environment.

C. If they carry out projects to develop a city, urban planners look at the needs of local people and the environment when they do this.

D. As carrying out projects to develop a city, urban planners look at the needs of local people and the environment.