Which B1 reason would be better

myakisma

New Member
A small business is about to invite a scientist - engineer- collaborator- business partner for a short visit under 10 days. Both sides have publications that demonstrate their science.
Yet, the scientist has had previously denied a visa, many years ago, so it is essential to apply with strongest justification. Which type of reason for this application would be better: "Research" (with no pay from US side) or "consultation with business partners"?
Are there any other suggestions you could offer to strengthen the application?
 
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