What is the voting age established by Amendment #26?

Amendment #26 to the United States Constitution established 18 years as the minimum voting age. Ratified in 1971, this amendment was largely influenced by the argument that if individuals were old enough to be drafted into the military for service during the Vietnam War, they should also have the right to participate in the democratic process by voting. The amendment eliminated previous state laws that allowed for a higher voting age, thereby ensuring a uniform voting age across the country.

The incorrect options reflect ages that were either previously established or debated at various times in U.S. history. For instance, the age of 21 was the standard voting age for many decades before the amendment brought it down to 18. The ages of 16 and 25 do not align with any significant legislation regarding voting rights in the context of the U.S. Constitution. Thus, the correct age set by the 26th Amendment remains 18.