Which of the following represents one of the three commonly-used clarification techniques?

Restatement is one of the three commonly-used clarification techniques because it involves repeating or paraphrasing what someone has said to confirm understanding. This technique is valuable in communication as it allows the speaker to ensure that their message has been accurately interpreted by the listener. By restating the information, the listener can clarify any potential misunderstandings and provide the speaker with the opportunity to elaborate or correct if necessary.

The other options do not serve the function of a clarification technique. Faking involves disingenuous responses or pretending to understand when one does not, which can lead to further confusion. Attacking refers to an aggressive or hostile response that does not contribute to clarification, and interrupting disrupts the flow of communication, making it difficult to achieve comprehension or clarity. Thus, restatement stands out as a constructive method for enhancing communication effectiveness.