Step 1: Understanding the Question:
The question asks to identify a "primary method" of social work from the given options.
Social work methods are professionally classified into two categories: Primary (Direct) and Secondary (Auxiliary/Supportive).
Step 2: Detailed Explanation:
Primary methods involve direct intervention with the clients to solve their problems.
There are three primary methods:
1. Social Case Work (working with individuals)
2. Social Group Work (working with groups)
3. Community Organization (working with communities)
Secondary methods support the primary methods and include:
1. Social Welfare Administration
2. Social Research
3. Social Action
In the given options, Social Action, Social Research, and Social Welfare Administration are secondary methods.
Case Work is the only primary method listed.
Step 3: Final Answer:
Therefore, Case Work is a primary method of social work.