b: the use of loaded words leaves readers with a bad feeling about the people who oppose rbST
Explanation:
Loaded words like "so-called", "stirred up", and "extremists" are chosen for the purpose of creating bias against supporters of animal rights. The negative feelings these words create do not make one feel either superior or encouraged to join animal rights activists.
I would say the answer is D, because when writing a summary you should probably include all of the things listed in the other options. Hope this helped!