The correct response is B: the guaranteed right to vote for adults, regardless of gender, race or age.
While the 14th Amendment establishes citizenship and equal protection under the law, it does not explicitly guarantee the right to vote for all adults. The right to vote regardless of gender or race was later addressed by other amendments, such as the 15th Amendment, which prohibits denial of voting rights based on race, and the 19th Amendment, which guarantees women the right to vote.