Correct option with reason and the explanation for non-correct options

Q5 A manufacturer's solicitation documents occasionally include detailed design specifications that are considered proprietary. Several potential suppliers from developing countries have expressed interest in offering products or services to the manufacturer company. Which of the foilowing actions will MUST likely help balance intellectual property protection with the eXpanded supplier base? a) Sourcing strictly from suppliers in advanced industrial countries b) Checking supplier references and past performance c] Drafting strong contract language concerning confidentiality d) Defining where any disputes will be settled