C. Chinese students．

D. Indian students．

　 Many people wrongly think that cities don't have farms and that fruits and vegetables are only grown in the country． Believe it or not, there are more and more urban farms popping up in cities all over the world．

Alexandra Sullivan, a food system researcher in New York City, studies urban agriculture． Urban agriculture is another name for farming and gardening in a city environment． Ms． Sullivan studies everything from tiny gardens in empty lots between buildings to bigger fields that have been planted and grown． According to Ms． Sullivan, "Urban agriculture has existed since cities have, across the world．"

The number of humans living in urban areas, or cities, is increasing． The amount of people who want to garden in urban areas is also rising, Ms． Sullivan says, "In small gardens, on rooftops and indoors, ________ grow fruits, vegetables, grains, and herbs, and raise animals to produce milk, eggs, honey, and meat． They use these foods as supplements to food produced by rural agriculture．" Even though some people who live in urban areas grow crops, urban residents still need to rely on food grown in rural areas． This is because a city doesn't have enough space to grow enough food for everyone living in it．

In New York City, urban farmers have come up with many different ways to grow their own produce, even though there isn't a lot of room． For example, Brooklyn Grange is a farming operation that has two rooftop vegetable farms in New York City． Altogether, the farms are made up of 2.5 acres of rooftop space． This makes Brooklyn Grange one of the largest rooftop farming operations in the world．

Brooklyn Grange grows all kinds of things． The farming company sells its vegetables to local residents and restaurants． And because the farms are on rooftops, they are specially adapted to their urban location． They use available space that is not needed for anything else． As more urban farmers find ways to grow food in cities, urban residents will be better able to get fresher materials for their meals．

8. Which of the following is Ms． Sullivan's opinion according to the next？________

A. The number of people living in cities is increasing slowly．