READING II Reаd the pаssаge belоw. Then, chооse the answer that best represents the main idea of the passage. Antarctica is a remote continent of great beauty as well as a challenge to adventurous explorers and scientists who want to know more about "The Last Place on Earth." It lies at the "bottom of the world" and is the highest (in elevation), driest, and coldest continent on earth. It is nearly one and a half times larger than the continental United States, and its coastlines are longer than those that surround North America. Deep oceans surround Antarctica today. However, 180 million years ago, Antarctica was at the center of a super-continent called Gondwanaland. That huge land mass was pulled apart into many pieces by the processes of sea-floor spreading. Over the last 175 million years, Antarctica has remained near the south pole while the other pieces of Gondwanaland moved north to become the continents that we now know of as Africa, Asia, Australia, Europe, North America, and South America. The areas between the land masses became great ocean basins. Antarctica has become a continent surrounded by water and covered by ice. It has not always been covered by ice, though. In fact, until 45-50 million years ago, there was little if any, ice covering Antarctica. By examining rocks, scientists have discovered that the climate was warmer and there were lush forests in the past. The rock evidence indicates that the first of many large ice sheets began to grow between 36-45 million years ago. Now, the massive ice sheet covering Antarctica acts as the "Earth's refrigerator" and strongly controls our global climate and sea level. Most maps of Antarctica show only the outline of the edges of this ice sheet. However, scientists have created maps of the continent under the ice, where there is both water and land. There are large seaways and bays that go far into the continent and lie below sea level, as well as large isolated lakes. Mountain ranges also lie under the ice. They are as long and high as those that cross the western United States. All that is known about what lies under the ice comes from remote sensing "radar" surveys that have been done by scientists from many countries. So far, these surveys cover only a very small part of Antarctica, and there are many surprises yet to be discovered under areas of the ice sheet that have not been studied. However, in general, most scientists believe the continent under the ice is much like any other land areas without ice.
If pоll results reflect 52% оf the sаmple hоlds а pаrticular view and the poll has a 3 percentage point margin of error, then the percentage of the population that holds that same view can be estimated to be as low as (fill in the blank).