Tamako knows that objects in our solar system revolve around one star called the sun. She was surprised to learn that there are star systems that have two stars. Help her to recall the name of this type of star system

Healing after the death of a loved one is most difficult when: a) the bereaved is not allowed to mourn in the way he or she wishes b) the death is a long, protracted one c.) a period of grief has already elapsed d) no other mourners are present