What country was ruled by the Schleswig-Holstein dynasty?

A. All linguistic concepts evolve solely out of the responses of people within a specific historical era.
B. All linguistic and social phenomena are texts, and the object of studying these texts is to reveal the underlying codes that make them meaningful.
C. All linguistics is in some way related to class struggle.
D. All linguistics is related to history, and therefore the meaning of linguistics relies exclusively on historical context.