Unlike mainstream American businesses, more than half of which fail, the failure rate for businesses in the Amish community hovers around 5 percent.
A. Unlike mainstream American businesses, more than half of which fail B. Unlike mainstream American businesses, in which the failure rate is more than half C. Unlike mainstream American businesses, where more than half of them fail D. While the rate of mainstream American businesses failing is more than half E. While more than half of mainstream American businesses fail 答案分析指出D的faling不够简洁,因为存在failure名词结构,但我认为这两个词不是一个意思 且,要和后面主句的主语对称,前面能用main stream American besinesses作为主语吗?我选了D,求指教!