The answer would be, C!
"People may speak to one another politely and still be divided by issues of race. "
I am 100% correct about this, if i am not let me know! - Matt
It's hot outside today.
It's is the contrasted form of it is and its is the possessive form *as it is without an apostrophe*.
For example:
The tree has lost all its leaves.
It's my birthday today.
Wouldn't it be Problem and Trouble?
The rest wouldn't make sense...