Coronary angiography, a sophisticated method for diagnosing coronary disease involving the introduction of a dye into the arteries of the heart , is now administered selectively , because it uses x-rays to observe cardiac function.
A for diagnosing coronary disease involving the introduction of a dye into the arteries of the heart , is now administered selectively , because it uses .
B for diagnosing coronary disease involving the introduction of a dye into the arteries of the heart , is now administered selectively , because of using
C for diagnosing coronary disease, involves the introduction of dye into the arteries of the heart and is now administered selectively , because it uses .
D to diagnose coronary disease that involves the introduction of a dye into the arteries of the heart , is now administered selectively , because it uses .
E to diagnose coronary disease involving the introduction of a dye into the arteries of the heart , which is now administered selectively , uses
A 为何错？答案C
修饰错误。involve本来应该是Coronary angiography的谓语。可是在A中修饰了a sophisticated method。同样，这个也是歧义的来源。involve应该和后面的be动词并列。
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