After the Revision and Further Study of the LOT and Its

After the revision and further study of the LOT and its factor structure, what discussion has risen about the concept of optimism?

A) How it can be manifested across cultures.
B) Whether it should be viewed as a unidimensional or bidimensional characteristic.
C) If optimism should be included within the concept of a similar construct.
D) Whether optimism can exist alongside depression.