What is the following sentence fragment missing

B) subject and predicate

The sentence fragment is only a preposition. It needs to have a subject to talk about, and a predicate with a verb to describe what the subject is doing, etc.

I think b

Explanation: because it doesn’t have a person/thing (subject) doing something (predicate)

citizens are given 25 years of life to prove their worth to society; if they fail to do great things

jenkins wanted the narrator to write a ghost story for his magazine. he wanted the narrator to give the readers a story based on the supernatural. he wanted him to give the readers real 'horror' stories and not the type of live ghosts which he had presented in his earlier stories.