Alice's Three Children Are Driving Her Crazy

Alice's three children are driving her crazy.They are constantly squabbling,calling one another names,and generally tormenting one another.To preserve what's left of her sanity,Alice has decided to try to convince the youngsters to get along.She promises them that she will take them to a Pixar movie if they will work together to clean their playroom in under 30 minutes.To reduce hostilities,Alice has fulfilled two necessary preconditions for reducing conflict,

A) the reduction of frustration and a common goal.
B) reduced stereotype threat and role differentiation
C) a neutral setting and role differentiation.
D) mutual interdependence and a common goal.
E) one-on-one interactions between in-group and out-group members and an informal setting.