Answer:
Options B and C are correct.
Step-by-step explanation:
The passage describes how sugar was important for the Egyptians while the questions asks about the value of white sugar over brown sugar.
Option B is correct since it means that dark sugar might not have been appreciated due to the amount of it and how easy it was to produce it.
On the other hand, option C points out that rich people liked white sugar as pure, sweet, and of course, white as possible, something that increased its value.