It depends really, as I haven’t read the whole story.
But here’s some answers.
A . Main, I believe that he is the main character because it seems that he has more screen time
B. A minor character, it seems that Sam is the a main character and the gardener is someone who is supporting the him and the story.
Hope it helps.
The two primary purposes for sending business messages are typically to __inform____ and ___persuade____.
I think it is C
Hope this help you?!