"On the basis of children’s unsophisticated verbal responses to hypothetical moral dilemmas, these psychologists conclude that
children lack the degree of moral reasoning skill necessary for their behavior, however compassionate, to be considered moral."
(A) The children studied by the second group of psychologists displayed a slightly higher level of moral reasoning when they were well rested than when they were tired.
Irrelevant - we are given that those children lack degree of moral reasoning skill so its breakdown doesn't provide us with an info to weaken the argument.
(B) Adults who respond to hypothetical moral dilemmas display a much higher level of moral reasoning than do children who responded to the
same hypothetical moral dilemmas.
Irrelevant - Comparison between adults and children's outcome to hypothetical moral dilemmas is not helpful for us.
(C) The children studied by the second group of psychologists displayed a slightly higher level of moral reasoning in response to hypothetical
dilemmas involving adults than in response to hypothetical dilemmas involving children.
Irrelevant - we are given that those children lack degree of moral reasoning skill so the breakdown of different "hypothetical dilemmas" doesn't provide us with an info to weaken the argument.
(D) In actual situations involving moral dilemmas, children display a much higher level of moral reasoning than did the children who, in the study by the second group of psychologists, responded only to hypothetical dilemmas.
Correct - this weakens the confidence that "hypothetical dilemmas" can't be used to generalise the children lack the degree of moral reasoning skill necessary for their behavior.
(E) Some adults who respond to hypothetical moral dilemmas reason at about the same level as children who respond to the same hypothetical moral dilemmas.
Irrelevant - Comparison between adults and children's outcome to hypothetical moral dilemmas is not helpful for us.