Can pollution pose a serious threat to health?

Вопрос:

Can pollution pose a serious threat to health?

Выберите один ответ:

• a. Yes, in some areas of big cities.
• b. No, any smoke or dust cannot be so dangerous for human's health;
• c. Yes, it is one of the most important problems of urbanization;

Ответ: c. Yes, it is one of the most important problems of urbanization;