Question 7.

The author evidently highlights the stability of utilizing textiles given its abundant supply{"...textile production was widespread and there were fewer problems with the supply of textiles..."}, the steady standard of measurement {"...the dimensions of a bolt of silk held remarkably steady from the third to the tenth century: 56 cm wide and 12 m long..."} and reliable quality {"...Furthermore, a full bolt had a particular value. If consumers ..."}. Transportation is not a dominant variable that is considered in the discussion pertaining to textiles. Hence, Option A is the correct choice.