Step 1: Understanding the Question:
We must decide which of the four listed principles belong to the professional ethics of a therapist. The answer depends on how many of them are valid.
Step 2: Think about what ethics protects:
Ethics in therapy protects privacy, freedom of choice, dignity and the client's wellbeing. Each statement can be matched to one of these four ideas.
Step 3: Privacy and choice.
Statement (A) is about privacy and statement (B) is about the client's free choice to take part. Both are standard rules, so both are included.
Step 4: Dignity and wellbeing.
Statement (C) protects dignity and rights. Statement (D) states the helping goal of reducing distress and suffering. Both are accepted parts of professional practice.
Step 5: Eliminate by counting.
Since A, B, C and D are all valid, any option that drops one of them cannot be right. Option (1) drops D, option (2) drops A and option (3) drops C.
Step 6: Confirm the remaining option.
Only option (4), A, B, C and D, keeps every valid statement.
Step 7: Double-check the reasoning.
A useful test is to ask whether any statement could harm a client or lower the quality of care. None of the four does. Each one protects the client or serves the purpose of therapy, so none of them can be dropped from the list.
Final Answer:
The right choice is option (4), A, B, C and D.