Controlling, deceitful, and vague verbal communication contributes to a closed climate, which creates an environment of mistrust and can lead to conflict. In contrast, open communication promotes healthy relationships. Thus, the characteristics of communication significantly impact the interpersonal dynamics within a group. ;
Controlling, deceitful, and vague verbal communication leads to a closed climate, where mistrust and discomfort arise. This environment discourages openness and can result in conflict. Therefore, the correct option is A. closed climate.
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