has led to economic growth in china, and these changes have in turn led to rising populations and growing industrialization. data demonstrates that air pollution levels have grown in many major cities because of these changes. while this growth has led to many improvements in china's economy, the problem of air pollution must be solved in the future. why is this sample an example of a strong conclusion? check all that apply. it restates evidence briefly and concisely. it provides a final opinion. it uses a parenthetical citation correctly. it sums up the key points made. it introduces important new information.