单选题：Questions are based on the following passage. Amid a summ

Questions are based on the following passage.
Amid a summer of record-setting heat, a new survey f'mds that most of Generation X's (20世纪60年代到70年代初出生的美国人) young and middle-age adults are tminformed and unconcerned about climate change.
Only about 5% of Gen Xers, now 32 to 52 years old, are "alarmed" and 18% "concerned" about climate change, reports the University of Michigan's Institute for Social Research on Tuesday. Two-thirds, or 66% , of those surveyed last year said they aren't sure global warming is happening and 10% said they don't believe it's occurring.
"Most Generation Xers are surprisingly disengaged, dismissive or doubtful about whether global climate change is happening and they don't spend much time worrying about it," said author Jon D.Miller.
The report comes as several Obama administration officials have recently linked extreme weather to climate change. In a report last week, the National Oceanic and Atmospheric Administration cited six weather events last year and said that atmospheric changes caused by the burning of fossil fuels made
Texas' heat wave, for example, 20 times more likely than it would have been in the 1960s.
The Generation X survey of about 3,000 adults, the fourth in a continuing series, found a small butstatistically significant decline in Gen Xer's attention to climate change. In 2011, 16% said they followed the issue very or moderately closely, down from 2296 in 2009.
Why are Gen Xere so indifferent? The report, funded by the National Science Foundation, citesclimate change's complexity, pressing economic concerns and "issue fatigue". It finds educated adults tend to be more concerned about the issue. It also finds partisan (党派的) differences; nearly half ofliberal Democrats were concerned or alarmed compared to zero percent of conservative Republicans.
Miller said he expected that, given climate change's expected impact on future generations, parents of young children would be more concerned than those without kids.
"Not so," he said. " Generation X adults without minor children were. slightly more alarmed aboutclimate change than were parents. The difference is small, but it is in the opposite direction than weexpected. "' Miller said the report suggests that while there's broad awareness of climate change, manyGen Xers prefer to focus on more immediate issues such as jobs and schools.
What do we know about the Generation X according to the passage? A．They are a group of people receiving little education.
B．They don't believe global warming will affect them.
C．They don't care very much about climate change.
D．They never think that climate change will happen.