The correct choice was B, I selected D. I found this statement really difficult to understand and even my BR took a while to do so if anyone can offer helpful tips on how they approached this question that would be greatly appreciated.
... identify what went wrong. NUMBERS vs. PROPORTIONs is a crucial distinction ... to e.g. POSSIBILITY vs. ACTUALITY, INATE vs. ACQUIRED, or MENTAL STATE ... vs. REALITY. Be vigilant, stay alert ...