Sam's bad habits include overeating, smoking, and talking a great deal. Freud might say that he is fixated at which psychosexual stage of development?

Oral

Explanation:

The first stage of Freud's theory of Psycho-sexual Development starts when a child takes birth to next 18 months of development. In this stage a child takes oral pleasure by putting everything in mouth. If not gratified properly, oral personality disorder can arise which could provoke strong tendency of consuming alcohol, eating too much, biting nails, smoking etc. At emotional level, individuals with this disorder depend on other or have a tendency of following others.