Generally, a consular officer may approve your visa if you demonstrate that you qualify for the B visa classification and are not subject to any ground of ineligibility. For the officer to refuse your application, they must determine upon facts or circumstances that would lead a reasonable person to conclude that you are ineligible to receive a visa. The burden of proof is on you to convince the officer that you are entitled to a visa. If you fail to establish this the law will presume you to be an intending immigrant and ineligible to receive a B visa.