D - A run-on sentence has only one clause
A run-one sentences has at least one independent clause and one dependent clause incorrectly connected.
D- Does not summarize the main points
They are not effective because they don't have evidence , support of claims. I hope that this is the answer that you were looking for and it has helped you. Have a nice day.
Answer:
report is written for a clear purpose and to a particular audience. Specific information and evidence are presented, analysed and applied to a particular problem or issue.
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