Which are examples of an expository writing style? check all that apply.

more than a hundred million e-mails are sent around the world each day, and they are all vulnerable to interception.
other attacks include the use of viruses and trojan horses.
but how can you bury a mountain of soil? before long, the army engineers came up with a plan that would allow them to do just that.
only a small fraction of the information flowing around the world is securely encrypted.
hall well understood the gamble the germans were taking.
when the war began, elizabeth van lew was considered a southern "spinster."