In the embryonic stage, what is the term for the layer that forms the muscles, bones, blood, and circulatory system?

________ is activating a node by a task that precedes the task of interest.

A. Priming. B. Remembering. C. Educing. D. Arousing.

For Freud, the mind is divided into __________ levels

a) one b) two c) three d) four