HEYAA!!!!!
OPTION D
To get the additive inverse of a positive number you put a minus in front of it and to get the additive inverse of a negative number, you remove the minus to make it a positive number.
because when u see the equation u can see it is -3-(-6)
which if u solve it the answer is -3+6= 3
so the correct option is
HOPE U UNDERSTOOD
THANKS
PLZ MARK AS BRAINALIAST