Which conclusion is best supported by the table?

Younger groups hold smaller shares of voters than of citizens, while older groups hold larger shares, so reported voters were older in composition than the citizen voting-age population, making B correct. Choice A is tempting because older voters are overrepresented, but those 65 and older were only 25.7 percent of voters, not a majority. Choice C invents a federal prohibition on young registration; the table shows no reasons. Choice D claims age was the only characteristic tied to turnout, though the table contains no evidence about other characteristics.