Rhythm in poetry is basically how you say the words. If you read all in the same tone it would sound like a robot is reading. So, when you read it you have to put more stress on syllables than others. That way you can try to covey what the author was feeling when they wrote it.
I am pretty sure it is 'B', A sign that something bad is about to happen
C. Pay your bills on time
The answer to your question is,
D. A repeated sound within a line of poetry.
-Mabel <3
