No. In an 8-1 decision authored by Chief Justice Morrison Waite, the Court concluded that the relevant sections of the Enforcement Act lacked the necessary, limiting language to qualify as enforcement of the Fifteenth Amendment. The Chief Justice first stated that the Fifteenth Amendment "does not confer the right of suffrage upon any one," but "prevents the States, or the United States, however, from giving preference…to one citizen of the United States over another on account of race, color, or previous condition of servitude." In examining the language of the Enforcement Act, the Court noted that, while the first two sections of the act explicitly referred to race in criminalizing interference with the right to vote, the relevant third and fourth sections refer only to the "aforesaid" offense. According to the Court, this language does not sufficiently tailor the law to qualify as "appropriate legislation" under the Enforcement Clause of the Fifteenth Amendment.
The only true option from the list would be that "<span>In time a fifth group was added to the caste system--the untouchables," since this was a later development and not an initial part of the system. </span>