In the Counseling and Helping Relationships core area, systemic and family counseling approaches emphasize that:

A family is a system, and problems (such as parental conflict and stepfamily tension) are best understood by observing the entire system interacting.

Early sessions often focus on joining with the whole family, clarifying roles, boundaries, and interaction patterns, especially in blended families where alliances and loyalties can be complex.

Option B, seeing the family as a whole in the first session, allows the counselor to:

Directly observe parent–child and stepparent–stepchild interactions,

Hear each member’s perspective on the arguing and its impact,

Begin to restructure communication and set shared goals collaboratively.

The other options fragment the system:

A (see each child separately) misses the systemic interaction at the heart of the complaint.

C (see parents together) may be useful later but does not initially address how the conflict is affecting the children or the overall family dynamics.

D (each parent with their stepchildren) reinforces existing divisions and alliances rather than treating the family as a single integrated system.

Therefore, B is the most appropriate first-session technique for this blended family issue.