Not giving someone credit for their own work. you can put quotations on whatever you take, but if you don't properly cite it as their work, then that would be another form of plagiarism.
I feel like it would be all of them but the one that calls out the most would be using another's ideas without giving them credit. Plagiarism is all about not citing or giving credit to the person who wrote the article,letter, essay, etc.. And using it for yourself claiming as though you wrote it yourself.
I think that rascism must have influenced what he learned because that teacher was teaching their students that they could not suceed based on the color of their skin.
