The paragraph speaks about the Japanese government's recommendation. The recommendation is the key idea of the passage. The recommendation is about regulating only genetically modified organisms, and leaving the rest. The reactions are mixed, however the author cautions about the unforeseen risks. Option 4 is the best choice. Option 1 goes out because the Japanese recommendation is about regulating only genetically modified organisms. This is the main idea, but option 1 does not cover this idea. The right word is exempting, not excepting. Also, the prematurity part of it is nowhere found in the passage. Option 2 says "creating categories within genetically modified products...defies law". The defying of the legal aspect of it is not there in the passage. Option 4 is the best choice.