1. Failure to Qualify for the Visa Category
The applicant must prove that the proposed activity fits a category listed in INA §101(a)(15). A B-1 applicant must establish permissible business activity; a B-2 applicant must establish a legitimate temporary visit; an F-1 applicant must establish a qualifying academic plan; and every other applicant must satisfy the elements of the requested classification.
A person can have strong employment and family ties abroad and still be denied because the intended activity does not fit the requested visa.