Need

read paragraph 3 from the article. think about it: for americans, turning on the stove mean simply turning a knob or a switch. for people living in developing countries, particularly women and children, it means hours of collecting fuels like firewood, dung, or coal to burn in a rudimentary, smoky cook stove or over an open fire. the result is a constant source of toxic smoke that families breathe in daily, causing diseases like child pneumonia, heart disease, and lung cancer, not to mention taking a child away from her education. which idea does this paragraph develop?

a) it is time for americans to explore alternative methods for cooking their food.
b) americans are responsible for the negative effects people experience when they use cookstoves.
c) in developing countries, the common method for heating food is problematic for people and for the environment.
d) by studying the cookstoves used in developing countries, we can learn ways to prevent many deadly diseases.