[求助]L2002-06-2-12/19

请哪位高手帮我看看这两道题

1 Rosen: One cannot prepare a good meal from bad food, produce good food from bad soil, maintain good soil without good farming, or have good farming without a culture that places value on the proper maintenance of all its natural resources so that needed supplies are always available.

which one of the following can be properly inferred from Rosen's statement?

答案是A: the creation of good meals depends on both natural and cultural conditions.

我的疑问是：怎么知道这是一个cause-effect的关系而不是conditional statements呢。看kaplan的解释是这样一个chain: culture——good farming——good soil——good food——good meal.如果按我的理解，摘取其中一段，one cannot maintain good soil without good farming，应该表示为good soil——good farming，正好与解释相反。麻烦哪位给我讲解一下，根据此题(general的区分方法我理解)，怎么辨别是cause-effect还是conditional statements

2 Phsician: Hatha yoga is a powerful tool for helping people quite smoking. In a clinical trial, those who practiced hatha yoga for 75 minutes once a week and received individual sounselling reduced their smoking and cravings for tobacco as much as did those who went to traditional self-help groups one a week and had individual counseling.

which one of the following is an assumption on which the physician's argument relies?

A the individual counseling recieved by the smokers in the clinical trial who practiced hatha yoga did not help them quit smoking.

C traditional self-help groups are powerful tools for helping people quit smoking.

答案是C， 我想知道A为什么不对。按我的理解不是要取出alternative explanation么。yoga与individual counseling一起使用，不是应该去除counselling的作用么。

期待高手的解答！！！！