The best revision for the student's rebuttal to the counterclaim could be phrased as follows:
"While it is true that the 18 to 29 age group has the lowest voter turnout rates, evidence from countries like Austria, which lowered its voting age to 16 in 2007, demonstrates that engaging younger voters can foster a culture of participation. Furthermore, as 16- and 17-year-olds are often studying government and civics, allowing them to vote can enhance their connection to the democratic process and encourage lifelong voting habits. By empowering these young citizens, we may see a shift in voting patterns that could ultimately increase overall turnout, including in the critical 18 to 29 age range."