To simplify the expression \( \frac{a^{67}}{b^{34}} \), we can look for any common factors or opportunities to simplify it.
Since there are no common bases between \( a \) and \( b \), the expression is already in its simplest form. It cannot be simplified further.
Thus, the simplified expression remains \( \frac{a^{67}}{b^{34}} \).
Based on the options provided, the correct answer is:
B. \(\frac{a^{67}}{b^{34}}\)