Answer:
b. them
Explanation:
their is used to show ownership
Ex: those are THEIR glasses
They is used to refer to a group of people or someones unknown gender
Ex: There THEY are
It is used to refer to objects
Ex: IT is a ball
there is more to it but this is a simple explanation
(8/15) - (1/3) =
(8/15) - (5/15) =
3/15 =
1/5
Soft tired tone because in the sentence you can get a vibe that he/she is tired.