Answer:
Detail your expertise and accomplishments.
Proposals are sales presentations.
Explanations:
A proper explanation of Copperbuild's level of expertise should be talked about. Their ability to effectively manage the new business which stems from the experience gained overtime as a small construction company. Also, relevant accomplishments overtime should be highlighted as this helps sell the company to investors as they would be in the know of possible outcomes should they decide to accept your proposal.
A major factor to be considered in proposal bids is for one to effectively sell his idea or product, you need to give reasons and really good ones on why you should stand out as compared to others. These will help make your proposal great and it will stand you out.