44. The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer.
A. as little risk as one in a million chances to cause—one指代risk B. as little risk as one chance in a million of causing C. as little risk as one chance in a million that it will cause--it重复
D. a risk as little as one chance in a million for causing—chance of doing or to do E. a risk as little as one chance in a million for it to cause—for it 罗嗦
D为什么错？我查了一下，for causing对，a risk as little as 也很常见 ”so those on 25 cigarettes a day or more have a risk as little as one-tenth that of non-smokers," | 
