The answer is B. Add variety to the sentence structure.
The answers are, 1.) It supports the idea that the burglary was planned in advance by men who were not career criminals or “typical” burglars. 2.) It suggests that the burglary was complicated and needed to be deliberately planned. 3.) It creates an unbiased tone, which allows the facts to speak for themselves.
“because the train will arrive any minute”
adverb clauses usually start with because, after, if, although
I would say A. because questions have nothing to do with head aches so B is out. C is out because you wouldn't generally find joy in that or would you reask many questions. D. is a no because what does sleep have to do with questions.
