this is an english assigmnet but i couldnt find the subject in the drop down menu.

READ THE PASSAGES ANSWER THE QUESTIONS THAT FOLLOW This is the first time in human history that most of the world's populations live in cities: 3.3 billion people ...and the urban landscape continues to grow. 38% of the growth is represented by expanding slums, while the city populations are increasing faster than city infrastructure can adapt. The objective of World Water Day 2011 is to focus international attention on the impact of rapid urban population growth, industrialization and uncertainties caused by climate change, conflicts and natural disasters on urban water systems. This year's theme, Water for cities, responding to the urban challenge, aims to spotlight and encourage governments, organizations, communities, and individuals to actively engage in addressing the challenges of urban water management. 21 What is the main idea of the passage above? A. The majority of the world's population should not live in cities B. The urban population must ensure they will have clean water in the future. C. Governments are unwilling to bring clean water to the world's cities. D.City infrastructures cannot cope with the expanding urban population 22 The world's urban population A needs more water to survive than the world's rural population, B. is growing too fast for the cities infrastructures to keep up C. is declining as necessary resources are being used up. D. is declining in the wake of devastating natural disasters 23 Based on the passage above, we can safely conclude that A. in previous eras, the majority of people did not live in cities. B. World Water Day 2011 is an effort to prevent global warming C. many governments do not care enough about their urban populations D. the population of rural areas continues to increase In the past fifty years, our world has been ravaged by violent conflicts that have claimed the lives of many millions of civilians and left tens of millions more permanently displaced These civilians have been expelled from their homes, and are often denied access to lifesaving food, medicine and shelter. Grave violations of international humanitarian and human rights law and blatant disrespect for the normative framework of humanity that has emerged over the past 50 years is common to many of these conflicts. Civilians have become the primary target of attack motivated by ethnic or religious hatred, political confrontation or simply ruthless pursuit of economic interests. This stark picture has led the United Nations, the International Committee for the Red Cross, regional organizations and many other international agencies to dedicate greater attention to protecting civilians in ongoing armed conflicts