To simplify \( a^{67} b^{34} \), we can express it as follows:
- It is already expressed in a simplified form with separate bases for \( a \) and \( b \).
- There are no common bases to combine through addition or subtraction of exponents.
Since none of the options match exactly, let me analyze the options given:
- 23: This response does not seem relevant.
- \( a^{33} \): This cannot represent \( a^{67} b^{34} \).
- \( a^{67} b^{34} \): This is the original expression; it is already in simplest form.
- \( ab^{33} \): This is incorrect because it misrepresents the original bases and their respective exponents.
Therefore, the simplified expression remains \( a^{67} b^{34} \) as it is already in its simplest form.
So the correct response is:
a67b34