Use the Table and the Given X-Ray Absorption Diagrams to Identify

Use the table and the given X-ray absorption diagrams to identify the composition of each of the regions marked by a letter. The number in each region shows its absorption, and the number on each X-ray beam shows the total absorption for that beam. $$\begin{array} { | l | l | l | l | l | l | l | } \hline \text { Type } & \text { Air } & \text { Water } & \text { Gray matter } & \text { Tumor } & \text { Blood } & \text { Bone } \\\hline \text { Absorption } & 0 & 1,000 & 1,020 & 1,030 & 1,050 & 2,000 \\\hline\end{array}$$ $a = 3100$ , $b = 3080$ , $c = 3070$

A) x = Blood
y = Bone
Z = Blood

B) x = Blood
Y = Gray matter
Z = Tumor

C) x = Bone
Y = Blood
Z = Bone

D) x = Gray matter
Y = Tumor
Z = Blood

E) x = Tumor
Y = Blood
Z = Gray matter