Parallel structure or parallelism is used when words are united by grammatical forms. The lack of a parallel structure can disrupt the rhythm of the sentence, where the sentence is grammatically unbalanced. The use of parallelism achives a good balance in sentence, alignment of related ideas, clarity and readability. By associating related ideas, the point of analysis is emphasized, the arguments are connected, easily visible and in this way the analysis is clear and easy to understand.
The answer is: B.
Answer: first of all you spelled “grad father” incorrectly it is “grandfather”
Explanation: you added a underscore but I don’t know what you mean do I need to fill in a blank but I hope you understand how to spell “grandfather” :)
The best answer is C. Einstein was horrified to think that Hitler might build an atomic bomb, so he wanted the United States to make one first. While Einstein was a renowned pacifist, he wrote a letter to President FDR, urging him to begin work on an atomic bomb so Hitler would not be the first. He later regretted his letter but thought the result was still better than if Nazi Germany had created it first.