To answer your question about the past version of Georgia's state flag, the correct statements about its adoption are as follows:
A. The flag was adopted in response to the decision in Plessy v. Ferguson. - This statement is generally considered accurate, as the flag's design and adoption were influenced by the historical context of racial segregation upheld by that decision.
D. Georgia adopted the flag to show the state's opposition to school integration. - This statement is also correct; the flag's design was seen as a symbol of resistance to desegregation efforts during the civil rights movement.
The other statements (B, C, and E) are not correct in the context of this specific flag's adoption. B refers to opposition that did not lead to an immediate replacement. C is inaccurate because the flag was not adopted specifically to mark the Battle of Chickamauga. E is incorrect as the flag was adopted prior to the Brown v. Board of Education decision.
So, the selected correct statements are A and D.