IdentifythetopicsfromA,B,andC31.Agrowingnumberofpeoplefeelthatanimalsshouldnotbeexploitedbypeopleandthattheyshouldhavethesamerightsashumans,whileothersarguethathumansmustemployanimalstosatisfytheirvariousneeds,includingusesforfoodandresearch.(from《英语思辨阅读》)