Step 1: Current through the components.
When the conductor and semiconductor are in parallel, the current through each depends on the resistance of the material. When the voltage is increased, the current will increase, but the ratio of currents remains the same.
Step 2: Conclusion.
Thus, the correct answer is option (C).
Final Answer:
\[
\boxed{\text{(C) the ammeters connected to both semiconductor and conductor will register the same current}}
\]