Directions: The following question tests your ability to recognize grammar and usage errors. The sentence contains either a single error or no error at all. No sentence contains more than one error. The error, if there is one, is underlined and lettered. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence is correct, select choice (E). In choosing answer follow the requirements of standard written English.

Fusion power refers to power generated by (A) nuclear fusion reactions; in this kind of reaction, (B) two light atomic nuclei fuse together, (C) with each other to form a heavier nucleus and in doing so, (D) release energy. (E) No error