I think the function of the verb in the sentence would be :
C. The verb connects the subject to words that tell the condition of the subject.
In this case, the subjects is Rosemary and the verb tells about Rosemary's current condition
Showing or feeling anger, annoyed
The correct answer choices are:
Atkinson unsuccessfully tries to stab the narrator.
And-
The clock strikes midnight while Withencroft is still writing.