I am pretty sure it is A or C.
I think the answer is C cause i believe thats when common core was introduced or started reall working
Answer:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Explanation:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
RSTDYFUVGBINUBJVHYCTRXESZATUXDYCUVJH GFXKTSE5ITRDYCGJ CDTU7CGH,YFHC,GJV.HUXFH,C GJDLURXF,