Which statement best describes the zero exponent rule and the special case for $0^0$?

Calculate $\frac{4^3}{4}$.

Solve for $x$:

$\frac{2^x}{2^3}=8$

Simplify symbolically $\frac{p^{2n+3}}{p^{n+1}}$. Express your answer in terms of $n$.

Simplify $\frac{a^5{b}^2}{a^3{b}^4}$ by canceling repeated factors, and write the result using only positive exponents.