1) f ''(x) < 0 [A] [B] [C] [D] [E] [F] [G]
2) maxima [A] [B] [C] [D] [E] [F] [G]
3) f increasing [A] [B] [C] [D] [E] [F] [G]
4) f '(x) < 0 [A] [B] [C] [D] [E] [F] [G]
5) f '(x) increasing [A] [B] [C] [D] [E] [F] [G]
6) local maxima [A] [B] [C] [D] [E] [F] [G]
7) f '(x) does not exist [A] [B] [C] [D] [E] [F] [G]
8) f '(x) = 0 [A] [B] [C] [D] [E] [F] [G]