The answer is C. or.
I can't really explain it good ,but I know for a fact it's C.or, plus it can connect back to the word either.
Answer: A. Extraordinarily important.
Explanation: Based on the information presented in the excerpt, we can infer that the information in the wireless message was extraordinarily important, because all the signs the characters give each other without even saying a word, like that the twitching of "Blinker's" eyes became more pronounced as he was reading the message and also the seriousness of de Grey while he delivered the message.
Answer:
Add clear and logical transitions between ideas and replace words and phrases with other that are more concrete
Intro,rising action,climax,falling action,ending