Natalia is giving a presentation to the head of a local sales company. The head tells her that he had a joint replacement that doesn't show up in x$-$ray machines yet sets off alarms at the airport security. This adds time for him at the airport security and has caused him to miss two flights in the past month. This conversation is:

$$ Need identification

C Post$-$sales service

$$ Price negotiation

$$ Qualifying the prospect