In Newer Models of Bipolar Disorder What Is the General

In newer models of bipolar disorder what is the general viewpoint of the condition?

A) Bipolar disorder is an evolving condition, proceeding through different at-risk stages with mild symptoms early and progressing to a later chronic disorder.
B) Bipolar disorder follows different stages with a severe acute onset, followed by mild symptoms later in life.
C) Many individuals can suffer from unipolar mania alone.
D) Most manic episodes are accompanied by depression or anxiety.