The answer would be C, to encourage investment in developing safer cookstoves and fuels. The author repeatedly mentions how dangerous cooking can be in developing countries and the effects the gas and stoves used can have on the population.
By listening to people that are fluent in a certain language, you can learn the right way to form a sentence and pronounce certain words.
The fire left 100,000 people without homes is the correct answer
A. It would be completely unexpected for someone to marry someone that they are not in love with.