You Love Me More, Right ?

When you children  want to know which one you love more is it because :

a) You show favouritism and the one you spend more time with or pay more attention to thinks that you love them more ?
b) It's just sibling rivalry as you try to share your time and attention equally on them. You love them differently but equally.
c) They sense that the  amount of time and affection you give to a child  is an indicator of how much you love them over other children.
d) None of the above.