Answer: An outline would help him plan what to say.
Explanation:
When writing a proposal, it is highly recommended by professionals to make an outline. Firstly, because it organizes everything and you would get an idea of what and how to say it.
It will not only help you to get a direction for writing the proposal, but will also help in saving a lot of time. It will assist in making sure that nothing is missed out, while presenting the proposal in front of others.