What is the best advice for an American businessperson who is traveling to Sweden on business?

$$ a$.$ Wait until you finish a complete explanation, no matter how long it is$,$ before requesting feedback.

$$ b$.$ If your Swedish colleague is having trouble finishing a sentence, show consideration by finishing it for him or her.

c$.$ Be wary of smiling because it can be misinterpreted in some cultures.

d$.$ Follow up oral negotiations and agreements in writing.