Question

Raising any base to the power of zero will yield _____.
a. 1
b. 0
c. 1
d. a nonreal number

Answer 1

Two of the choices are both correct.
They are 'a' and 'c'.

Answer 2

The answer is 1
I'm not sure what letter though because you wrote both a and c as 1

Here is a good way to think about it

$10^{4} =10000$
$10^{3} =1000$
$10^{2} =100$
$10^{1} =10$
$10^{0} =1$
$10^{-1} =.1$
$10^{-2} =0.01$
$10^{-3} =0.001$
$10^{-4} =0.0001$