please solve and explain

(1 point) Select all subsets that are vector subspaces of Fun (IR) DA. at br + cx2 a + 36 + 3c =0, a,b,cER OB. JO Oc. c(x - a)2 a,CER OD. f(x) f(-x) = f(x), allER DE. { f(x) f(x) 2 0, all r ER OF. f(x) f(2) = 0, f(1) = -2 G. { f(z) | -2f(-2) - f(V3) =0 OH. Ja43 + br47 | a, b ER DI. { f (x) f (I + 7 ) = f(I), allrER OJ. Ja sin(4x) + bcos(4x) +c a,b,cER