To which activism was the school board referring to

If we’re talking history here it might be the Brown vs. Board of Education of Topeka where the court ruled that segregation in public schools was unconstitutional.  This was because of the inequality of facilities in Black schools compared to White schools.  This would pave the way to integration of schools in the U.S.

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

answer:

won re-nomination with no opposition he also had the support of his party

explanation:

it saw incumbent president andrew jackson, candidate of the democratic party, defeat henry clay, candidate of the national republican party. jackson won re-nomination with no opposition, and the 1832 democratic national convention replaced vice president john c. calhoun with martin van buren.