In What Sense Are Nationalities "Imagined Communities

In what sense are nationalities "imagined communities"?

A) Modern nationalities are imagined because all were created by colonial governments.
B) Despite their shared feeling of comradeship, most members of a nationality will never meet; they only imagine that they participate in the group.
C) Nationalities do not exist in real terms; they are merely fictional constructs of the ruling intelligentsia.
D) Nationalities are comprised of many different ethnic groups and subcultures, and therefore may disintegrate at any moment.
E) The members of a nationality constantly compare their society to an idealized, quasi-historical past.