Answer:
D. Move the prepositional phrase.
Explanation:
Prepositional phrases are groups of words that consist of a preposition, its object, and words that modify the object. They can often be encountered at the beginning of the sentence. With the prepositional phrase at the beginning, the given sentence would look like this:
In his history book, Kris read about the Egyptian pyramids.
It's good to put a comma after an introductory prepositional phrase, although it is optimal as long as the phrase isn't longer than four words.
