True. There can be several Incidents that may be contained within the plot, but it doesn't define it.
The answer would be B, the rhyming of the second and fourth lines of each stanza
This is a sentence, it is complete.
it is appropriate to break the rule that requires subjects joined by and to use a plural verb when either and neither are subjects. They always take singular verb.
For example :
Either of us is capable of doing the job
what book or video is it from i can probably help
