Answer: Earning a spot on the football team (which has won the championship the last two years) is quite an accomplishment.
Explanation: This is the only sentence that shows proper punctuation, by using parentheses to enclose a relative clause that adds information. In the first sentence, there is no reason to put the indirect object between parentheses. The third sentence lacks commas or parentheses around <em>a safe driver</em>. The fourth sentence should have both commas deleted and parentheses added around <em>in time for the start of the new fall semester.</em>
Lee ensured that the reader would be predisposed to distrust the Ewells simply by focusing on two main characteristics: appearance, and intellect. The Ewells, from the very start, appeared unpleasant, lacking in basic intellect, and immoral.