Answer:
Karen Horney
Step-by-step explanation:
Karen Horney is known to be a German psychoanalyst that developed theories of neurosis.
Neurosis can be described as a mental illness that is known to be caused by anxiety, stress among others.
Karen Horney believed that neurosis is the result of most especially basic anxiety which is cause by interpersonal relationship.
Note that, interpersonal relationship can be explained as a strong relationship between two more people, especially family members, e.g parents and their children.
In this case, Tony is experiencing anxiety , because she lacked interpersonal relationship, which is a strong relationship that is accompany by love and care from her mother that abandoned her when she was 5 years. This is the theory explained by Karen Horney.