Footnotes are a common method of ____________

Under which of the following types of listings might the listing broker fail to qualify for a commission, even if he procures a buyer and the seller accepts that buyer's offer:

A: Exclusive right to sell listing; B: Exclusive agency listing; C: Net listing; D: Open listing.

One of the chief complaints from government decision makers is that vendors have not done their homework. What are some ways a vendor can avoid this perception?

What will be an ideal response?