Read the passage from Sugar Changed the World.
A stream of pale ash-colored syrup gushed out from t
mills, bubbling white with foam. The liquid rushed dow
wooden gutter directly into the boiling house, a buildin
massive furnaces and cauldrons, where the syrup was
heated and strained and turned into crystals. A giant
copper kettle-often about four feet across and three
deep-waited for the pale river. This was the first in a
series of ever-smaller cauldrons, and beneath each ga
what the Brazilians called the "great open mouths"-
huge furnaces that had to be constantly filled with the
wood that workers had chopped down and hauled to
ready for this moment. The boiling house was as perild
as the mills, for if a person nodded off for a second, hd
she could slip into a bubbling vat.
with the
which text evidence best supports the authors' claim that sugar progressing was a long and difficult process?