Which of these sentences from the passage most directly expresses the author's claim?

a. "we shouldn't worry too much, though, because it is precisely our mistakes that teach our children the most about life."

b. "if we give up trying to make the right decisions, they might get the message that we don't care about their future."

c. "we can take comfort in this much: we teach our children even when we're not trying to."

d. "shielding our children from [mistakes] by striving for perfection in our own parenting does them no favors."