Which of the Following Ways of a Parents' Giving Praise

Which of the following ways of a parents' giving praise is most likely to enhance a child's intrinsic motivation?

A) When Stella tells her eleven-year-old daughter, "I'm so proud of you for coloring that picture without going outside the lines."
B) When Ted tells his thirteen-year-old son, "Good job! You went after that football trophy, and you won it!"
C) When Maria tells her fourteen-year-old daughter, "You're so smart! You won the science fair, and you hardly spent any time at all on your project!"
D) When Jim tells his twelve-year-old son, "You worked really hard on designing that website, and you're becoming quite the expert Web designer!"