问题
单项选择题
Many individuals opt for "snake oil" because they ______.
A．are misled by a secret formula
B．cannot afford a treatment
C．lack medical knowledge
D．do not trust physicians
答案
参考答案：A
解析：[分析] 细节题型。 参看第三段第二句...a salesperson who says that several bottles of a secret formula“snake oil”will cure not only cancer but tuberculosis as well, some individuals will opt for“snake oil”．