Which delivery type shows significant problems in clarity?

Poor delivery significantly impacts clarity because it often involves issues such as slurred speech, unclear articulation, or lack of enthusiasm, which can confuse the audience. When the speaker fails to convey their message effectively, key points are lost, and the overall communication becomes ineffective. This undermines the audience's ability to understand the presented information clearly. In contrast, good, fair, and average delivery types are associated with varying levels of clarity and coherence but do not inherently present the same level of issues as poor delivery, making them more effective in ensuring that the message is understood by the audience.