5.6 Randomized comparative experiment? For which of the following studies would it be possible to conduct a randomized comparative experiment?
(a) A study to determine if the month you were born in affects how long you will live.
(b) A study to determine if taking Tylenol dulls your emotions.
(c) A study to determine if a person’s sex affects his or her salary.
(d) A study to determine if the wealth of parents affects the wealth of their children.