ANSWER
Two different species of mice migrated to the river from different directions.
EXPLANATION
Solved scientifically in my head.
In an essay it should only be one I'm pretty sure, but in a narrative as many as it takes to explain a lesson learned. If you were writing a book your conclusion would be whatever comes to you and whatever you feel the characters would do/say/feel.
I would say (C) Please because right before the "suit" statement it said he loved the color blue and love is a type of emotion as well as being pleased.
No however you can be thankful
