Answer
(a) B
(b) C
(c) B
(d) C
Work Step by Step
Any real number raised to the 0th power equals 1, so $6^{0}$ and $(-6)^{0}$ = 1. If there is a negative sign in front that is not in parentheses, such as -$6^{0}$ it is not raised to the 0th power, so it would be -1.