The answer is A) Manipulative aids. Those are physical learning tools that teachers use for their students for hands on learning experiments. They are not technological. Slideshows, Dvd's, and audio clips are all technological aids because they are tech that help you present something, or get something done. A does not. You can manipulate A easier than you can with tech. A is also not technology, and does not make sense.
~Deceptiøn