In what two ways does the author support his argument, in paragraphs 1 and 2 of "What is an American?" They remind the reader of the causes of the American Revolution. They emphasize the differences between England and America. They establish a connection between the British and the Americans. They inspire admiration for the rapid development of America. They advocate further exploration of America. Reset NextWhich two claims are supported by the information in the passage? Students should avoid athletic events, as they could lead to concussions. Concussions are the deadliest injury on Earth. Diseases like dementia, Alzheimer's, and Parkinson's occur only after a head injury. Concussions are largely prevalent in high school athletes. Following an injury, athletes should rest until their symptoms return to normal levels.