8. [4 points] Let A be a square matrix, which of the following matrices are symmetric? (A) ATA ( B) A+ AT (C) A2+ A+1 (D) (A) and (B) (E) (B) and ( C) (F) (A) and ( C) ( G) (A) (B) and ( C) (H) NONE OF (A)(B) (CY (D) (E) ( F) or ( G) END of QUESTIONS