Answer: • Tell Dan he cannot influence the site decision.
• Tell Dan that their family relationship makes him ineligible for the bid.
Step-by-step explanation:
A situation in which the concerns and aims of the two different parties become incompatible.
Here, in the given situation, Jeff is helping his manager to organize the picnic site and finding food vendors. Dan is a food trunk owner but as he is brother in law of Jeff. Jeff may not like Dan to interrupt in his job. This may create a situation of conflict of interest.