What Was Mary Richmond's First Published Book on Social Casework?

The correct answer is C. Social Diagnosis.

Mary Richmond's book "Social Diagnosis" published in 1917 was her first comprehensive work on social casework. It laid the foundation for the scientific methodology of the profession and explored the interaction between individuals and their environment as the root of social problems. While her other works like "Friendly Visiting among the Poor" and "What is Social Case Work?" contributed significantly to the field, "Social Diagnosis" was the first formal and in-depth publication dedicated to the subject.

Here's a breakdown of the other options:

• A. Social Case Work: This was not a title of any of her books.
• B. Social Work: This was a broader term and not the title of any specific book by Richmond.
• D. Working with Individuals: This does capture the essence of social casework, but it wasn't the actual title of her book.

Therefore, only option C accurately identifies Mary Richmond's first published book on social casework.