A.
The middle column of Table 10.5.C cannot be ignored. The middle column is the radiation level smack on the direct outer surface of the package where the radiation is theoretically higher than the radiation measured at one meter from the surface of the package, i.e, the readings of the first column.

Take for example, a package which measures TI 0.5 but when radiation is measured smack on the outer surface of the package, the reading was 0.7 mSv/h. Alpha rays travel only 2 to 3 centimeters therefore it will not be detected at one meter away from the surfaccce, This package is III-Yellow.