Of the following, which is the best example of appropriate praise given to a child?
a. "no wonder your mother always calls you 'mr. clean.' you're always willing to clean up after yourself."
b. " you for your today in cleaning up the classroom. you really did a great job."
c. "what a good guy you are. i know i can always count on you to me clean up."
d. "you're always so . for me clean up the classroom today."