Final answer:
A. Offering advice. Offering advice is a barrier to therapeutic communication with a client who has a substance use disorder. The nurse should instead focus on listening attentively and reflecting on the client's feelings and thoughts.
Step-by-step explanation:
The nurse should identify offering advice as a barrier to therapeutic communication when communicating with a client who was just admitted for treatment of a substance use disorder. Offering advice can undermine the client's autonomy and discourage them from actively participating in their own treatment process. Instead, the nurse should focus on listening attentively, reflecting on the client's feelings and thoughts, and providing relevant information when necessary. These techniques promote trust, empathy, and collaboration, which are crucial for effective therapeutic communication.