CT has all of the following advantages over conventional film radiography EXCEPT:

A. CT eliminates the superimposition of images of structures outside the area of interest.
B. Due to the inherent high contrast resolution of CT, differences between tissues that differ in physical density by less than 1% can be distinguished.
C. Conventional radiography requires a 10% difference in physical density to distinguish between tissues.
D. Due to the inherent high contrast resolution of CT, differences between tissues that differ in physical density by less than 5% can be distinguished.