Singer gives the following argument:P1: If racism and sexism are wrong, then speciesism is wrong.P2: Racism and sexism are wrong.C: Therefore, speciesism is wrong.This argument is _____. A. invalid, because it has a false premise B. valid, because it has the form of modus tollens C. valid, because it has the form of modus ponens D. invalid, because it has a false conclusion