Without transitions the argument will sound bland and unorganized. All the hardwork put into the essay will be futile if there is no embellishment in the writing. Their must be ingenuity put into the argument, like transitions, to keep a reader comprehending your argument, as well as following each and every detail. Without transitions, your paper will not be able to do that.
Answer- technology
explanation-
computers, telephones, and the internet are all examples of tools that are technology or used within a piece of technology.
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.
The answer is choice D. incessant