The passage starts with a few questions. The answer is nowhere given by the author. After the questions, the author says that proponents of bad Samaritan laws must overcome three obstacles, and further goes on to elaborate what those obstacles are. These obstacles are the test which must be overcome as per the author. Thus choice 2 is the best choice. Option 4 goes out because nowhere has the author suggested or implied that the laws must be enacted. The idea of 'everyone agrees', in option 3, is again nowhere found in the message and nor is it the main idea of the passage. Though what is given in option 1 is correct in the context of the passage, it is not the key focus on the paragraph. In summary questions we must capture the key idea of the passage. Any option that ignores the key idea cannot be the right choice.