Questions 10-11 are based on the following.

Partly because of bad weather, but also partly because some major pepper growers have switched to high-priced cocoa, world production of pepper has been running well below worldwide sales for three years. Pepper is consequently in relatively short supply. The price of pepper has soared in response: it now equals that of cocoa.

11. Some observers have concluded that the rise in the price of pepper means that the switch by some growers from pepper to cocoa left those growers no better off than if none of them had switched; this conclusion, however, is unwarranted because it can be inferred to be likely that

(A) those growers could not have foreseen how high the price of pepper would go

(B) the initial cost involved in switching from pepper to cocoa is substantial

(C) supplies of pepper would not be as low as they are if those growers had not switched crops

(D) cocoa crops are as susceptible to being reduced by bad weather as are pepper crops（C）

(E) as more growers turn to growing cocoa, cocoa supplies will increase and the price of cocoa will fall precipitously

答案是C,但是對題目的意思跟答案如何解出還是不明白 請大家指點

一部分原因是坏天气，一部分原因是种胡椒的人改种价格更高的cocoa，造成胡椒在连续3年供应不足，价格抬升到与cocoa一样高。

因此一些观察家认为那些改种cocoa的人并没有比他们不改而继续种胡椒得到更多的好处。但这种说法是不足取信的，因为从上文可以推出：

C，如果那些人不改种cocoa，胡椒的供应也不会如此短缺（当然价格也就不会这么高）