Which recommendations in Chapter "Achieving a Readable Style" operate in the revisions of the following sentences? Why do these principles result in clearer, more concise revisions?

i. A stroke is an increasingly common problem associated with the brain. It is caused when a vein or artery in the brain is obstructed. This results in loss of consciousness from the loss of oxygen in the brain A stroke, an obstruction in a vein or artery in the brain, results in loss of consciousness as the brain does not receive oxygen ii. There is another method that is more invasive to the patient but proves to be successful enough to treat stroke Another more invasive method proves successful in treating stroke. 111. There are many proposed solutions for ridding the United States of oil dependency. Many proposed solutions target reduction of US oil dependency