To simplify the expression \( \frac{a^{67}}{b^{34}} \), we can look for ways to factor or simplify it further. However, without any common bases or exponents that can reduce, it remains in that form.
Thus, none of the options provided actually simplify \( \frac{a^{67}}{b^{34}} \) correctly. The expression is already in its simplest form unless further context is provided.
The correct answer based on your options is:
\( \frac{a^{67}}{b^{34}} \) (as it remains unchanged).
This appears to be the only option that maintains the integrity of the original expression.