To see how much knowledge you have gained, to see what helps you learn and also these tests tell your teacher what they need to do to improve there teaching as much as for you to improve your knowledge
I would have to say formal, mainly because I looked it up on google.
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.
In my opinion, I think it is A.
Hope helps-Aparri
If you don't have answer choices, I would say either peer editing or reading it aloud and listening for errors.