The fact that most Americans live in urban areas does not mean that they reside in the center of large cities. In fact, more Americans live in the suburbs of large metropolitan areas than in the cities themselves.
The Bureau of the Census regards any area with more than 2,500 people as an urban area, and does not consider boundaries of cities and suburbs.
According to the Bureau, the political boundaries are less significant than the social and economic relationships and the transportation and communication systems that integrate a locale. The term used by the Bureau for an integrated metropolis is an MSA, which stands for Metropolitan Statistical Area. In general, an MSA is any area that contains a city and its surrounding suburbs and has a total population of 50,000 or more.
At the present time, the Bureau reports more than 280 MSAs, which together account for 75 percent of the US population. In addition, the Bureau recognizes 18 megapolises, that is, continuous adjacent metropolitan areas. One of the most obvious megapolises includes a chain of hundreds of cities and suburbs across 10 states on the East Coast from Massachusetts to Virginia, including Boston, New York, and Washington, D.C. In the Eastern Corridor, as it is called, a population of 45 million inhabitants is concentrated. Another megapolis that is growing rapidly is the California coast from San Francisco through Los Angeles to San Diego.

The underlined word "integrate" in Paragraph 3 is closest in meaning to ______.

A．benefit

B．define

C．unite

D．restrict

回顾过去一年“新常态”无疑是描述当下中国的关键词之一。进入“新常态”，意味着中国经济将转向质量效率型集约增长，意味着要推进消费扩大和升级。

材料一：2002-2013年城乡居民文化消费及相关数据（元╱人）

注：①2014年，东、中、西和东北地区居民文化消费总量之比为196：111：119：100，文化消费占消费支出的比重分别为8.1%、6.5%、6.6%和5.5%；②在许多发达国家和地区，居民文化消费占总消费额的30%以上。

材料二：近年来，全国各地积极开展“书香中国万里行”“书法进课堂”等文化活动，有力地推进了社会主义文化强国建设。为了保障社会主义文化建设活动顺利开展，财政助力文化，文化部、教育部等部门出台了一系列政策，如实施文化消费补贴制度，培育文化消费需求，扩大文化消费规模；继续扩大各类文化产品和服务的政府采购，加大对文化人才培养的投入力度。财政助力文化。

结合材料一，运用《经济生活》中有关消费的知识，谈谈应如何进一步释放我国居民的文化消费潜力。