Why do science texts that include historical facts often include large gaps of time?

A) Writers often try to include only one or two concepts and theories that form the backdrop for a more recent concept or theory.

B) Writers often try to focus on the concepts and theories that were the most important or the most widely accepted.

C) Writers often try to focus on the concepts and theories that made the most sense based on information known today.

D) Writers often try to include all of the concepts and theories that form the backdrop for a more recent concept or theory.
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