Final answer:
The nurse should explain that 'I statements' allow participants to express opinions without blaming others, fostering a non-confrontational and respectful dialogue in the group.
Step-by-step explanation:
The nurse's most appropriate explanation for the value of using 'I statements' in an assertiveness training group is option 1: When 'I statements' are used, opinions are communicated without blaming others. This technique promotes direct yet non-confrontational communication. It involves the speaker taking responsibility for their own feelings and thoughts rather than attributing them to external causes or blaming another group member. This helps to keep the discussion open and avoids escalating conflict. 'I statements' foster a respectful environment and encourage constructive dialogues focused on problem-solving rather than fault-finding.