ANSWER
Two different species of mice migrated to the river from different directions.
EXPLANATION
Solved scientifically in my head.
“Dear Basketball” illustrated the poem Bryant wrote as a farewell to the sport he loved which is basketball. it served as his announcement that the 2015-16 season would be his last. In the poem, realizing that his body can no longer bear the game's demands, he accepts the inevitably of retirement and has been retired ever since 2016.
<em>(Have a good day!)</em>
Choice A is my top choice in this question.
