The answer is [ because of the separation, sentences with this error often sound awkward, ridiculous, or confusing.]
B. Thou and know is a slant rhyme
The last choice, "Teens who sleep less than 5 hours a night suffer from more immune related illnesses according to a study released in 2015 by the American Journal of Medicine." It gives a source to where the information had been gathered.
D. Say what the other person wants to hear
Answer:
it's important to add a reflection in your story because it's for you to express yourself.