Answer:
They make your readers more likely to believe what you say.
Step-by-step explanation:
The above is the correct.
Including reasons in your report is a strategy that will likely make your readers to believe what you say. Those reasons make your readers to also want to reason along your line of thought. Giving reasons is a way of making your report solid.
Reports actually help to communicate information to an audience. It usually focuses on transmitting information with a clear purpose, to a specific audience.