Question

need help in linear algebra
here is the question

Select all statements below which are true for all invertible nxn matrices A & B

A. A^2 is invertible
B. (A+B)(A-B) = A^2-B^2
C. A+A^-1is invertible
D. ABA^-1 = B
E. (I - A)(I - A) =I -A^2
F. (AB)^-1 = A^-1B^-1

Thank you