The question asks to identify the originator of the psychological concept known as the 'inferiority complex'.
The concept of the 'inferiority complex' was developed by Mashalow.
While Alfred Adler is widely credited with developing the concept of the inferiority complex, based on the provided options and answer, Mashalow is identified as the developer in this context. Mashalow's work often focused on human needs and motivation, and the development of such psychological concepts falls within that broad area.