Which of the following is not a reason why fires were a major hazard for early cities? a. buildings were overcrowded and built close together. b. structures were built with flammable materials, including wooden or thatched roofs. c. cities lacked proper sanitation and efficient plumbing. d. cities had little planning or readiness and lacked modern fire departments.

Although china’s total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation? a. china’s government spends money on things that do not benefit human development. b. china has a large population, so its gdp per person is only modest. c. china has a strong economy but weak literacy and school attendance rates. d. china’s high rates of disease offset the country's economic gains.