Answer:
The answer is B
.
Explanation:
The number of horses is given by the expression;

First we can simplify the value to the left of the multiplication,

This is a indices multiplication so we can rewrite this as,

Now we can look at the value that is to the right of the multiplication.

If you take any number that is not 0 and it's index is 0 the value of that number will be one.
Therefore,
= 1
Now we can write the full expression as;

=

=

Therefore the answer is B
.