og官方解答
Explanation for Correct Answer A : 
The error in this sentence occurs at (A), where there is faulty subordination. The pronoun "that" is incorrectly used to introduce a clause that should begin with the prepositional phrase "in which."
Explanation for Incorrect Answer B : 
There is no error at (B). The adverb "frighteningly" appropriately modifies the verb "accelerates."
Explanation for Incorrect Answer C : 
There is no error at (C). The pronoun "itself" is properly used to emphasize the preceding noun, "change."
Explanation for Incorrect Answer D : 
There is no error at (D). The adjective "only" logically modifies the noun "constant."