The Power rule for exponent states that to raise a power to a power you need to multiply the exponents .
According to this rule
[tex] (a^m)^n=a^{mn} [/tex]
If we look at the options Option 1 is using the power rule
It [tex] (b^p)^q=b^{pq} [/tex] it shows that you can find the power of a power by finding the product of the exponents
The other options are adding or distributing the powers and is not following the power rule.
