A study of marital relationships in which one partner s sleeping and waking cycles differ
A.Married couples in which both spouses follow the same sleeping and waking patterns also occasionally have arguments than can jeopardize the couple"s marriage.
B.The sleeping and waking cycles of individuals tend to vary from season to season.
C.The individuals who have sleeping and waking cycles that differ significantly from those of their spouses tend to argue little with colleagues at work.
D.People in unhappy marriages have been found to express hostility by adopting a different sleeping and waking cycle from that of their spouses.
E.According to a recent study, most people"s sleeping and waking cycles can be controlled and modified easily.