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.
The answer is the third choice or choice C. Persuade means to CONVINCE someone to try to do something or try something. In this case the speech is PERSUADING the audience to become vegetarians.