which of the following expressions is equal to 1?
A5^0 x 6^-3 x 6^3 x 5^1
B5^2 x 6^-2 x 6^3 x 5^-3
C5^2 x 5^-2 x 6^0 x 6^2
D5^-1 x 6^5 x 6^-5 x 5
A5^0 x 6^-3 x 6^3 x 5^1
B5^2 x 6^-2 x 6^3 x 5^-3
C5^2 x 5^-2 x 6^0 x 6^2
D5^-1 x 6^5 x 6^-5 x 5