My take:
A) Errors in the tempering process can result in the chocolate not reaching its correct solidified state.
The passage does not discuss anything about the errors (Out of scope)
B) Q's production costs can amount to almost 90% less than those spent by other chocolatiers in the industry.
No information to prove this. Q spends 90 % on ingredients & tempering and the production costs are less than those for other manufacturers. => the production costs of Q can be 10 % less than other's
...
A) Errors in the tempering process can result in the chocolate not reaching its correct solidified state.
The passage does not discuss anything about the errors (Out of scope)
B) Q's production costs can amount to almost 90% less than those spent by other chocolatiers in the industry.
No information to prove this. Q spends 90 % on ingredients & tempering and the production costs are less than those for other manufacturers. => the production costs of Q can be 10 % less than other's
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