Which statement about moral development in middle childhood is true?
a) school-age children typically say truth telling is always good and lying is always bad.
b) "in middle childhood, children primarily rely on reinforcement to acquire morally relevant behaviors."
c) "during middle childhood, children construct a flexible appreciation of moral rules."
d) "while school-age children think about right and wrong, they usually copy their morality from others."

"six months ago, several of molly's friends joined the trimtime fitness center. each of them participated in trimtime's weight-reduction and fitness regimen. all reported substantial weight reduction, and all are visibly slimmer. molly is convinced. she joins trimtime and enrolls in the program, hoping and expecting to see the same results. she is especially delighted to learn that trimtime had adjusted its program to make it even more effective in a shorter period of time." what is the feature in question/attribute of interest in this argument?