请教各位牛人！

Ricky2835

本人最近在联系XDF那本商学院入学指导 有下述两题疑惑 请牛人解答！十分感谢！
7. Stronger patent laws are needed to protect inventions from being pirated. with that protectiong, manufacturers would be encouraged to invest in the development of new products and technologies. such investment frequently results in an increase in a manufacturer's productivity.
which of the following conclusions can most properly be drawn from the information above?
A stronger patent laws tend to benefit financial institutions as well as manufacturers
B increased productivity in manufacturing is likely to be accompanied by the creation of more manufacturing jobs
C manufacturers will decrease investment in the development of new products and technologies unless there are stronger patent laws.
D the weakness of current patent laws has been a cause of economic recession
E stronger patent laws would stimulate improvements in productivity for many manufacturers
我选的是C 请教为什么C不可以

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
E as more growers turn to growing cocoa, cocoa supplies will increase and the price of cocoa will fall precipitously.
这题我选的是A，里面的逻辑关系有点搞不明白

sdcar2010

2) is a must-be-true, again. What matters is not how high the price of pepper can go, but which one is more profitable, the pepper or the cocoa!

sdcar2010

1) is about sufficient and necessary conditions.  lus, it is a must-be-true type of question.  Based on the passage, you know when will manufacturing industry increase investment.  However, it does not tell you when it will decrease investment.  No trigger is found.