B) highlight the supremacy of certain concepts. This is the correct option.
In the Declaration of Independence, these words are capitalized: Form of Government ; Right of the People ;Safety and Happiness. The concepts which are supreme are the fact that any government organisation must guarentee the well being of the people. Their well-being is to be safe and happy. This is their right.
These options are not correct:
A) emphasize the uniqueness of specific ideas. The ideas are not unique or original. The ideas are extremely important.
C) illustrate the author’s writing style. It is a document and the style does not belong to a writer but to the nation's spirit.
D) relate personally to the readers. It is a document and it relates to a whole nation.