Read the excerpt from Locke's An Essay Concerning Human Understanding, Book II, and answer the question.

Observable in children. He that attentively considers the state of a child first coming into the world, will have little reason to think him stored with plenty of ideas. I think it will be granted easily, that if a child were kept in a place where he never saw any other but black and white till he were a man, he would have no more ideas of scarlet or green, than he that from his childhood never tasted an oyster, or a pine-apple, has of those particular relishes

This kind of thinking is an example, for Locke, of _____.

abstraction of general ideas
retention of primary qualities
the mind as a tabula rasa
children as independen substancest