A

Step 1: Understand the behavior of conductors and semiconductors with temperature changes.
Step 2: For conductors (like metals), increasing temperature causes an increase in resistance due to increased lattice vibrations which obstructs the flow of electrons.
Step 3: For semiconductors, increasing temperature results in a decrease in resistance because more charge carriers (electrons and holes) are created, enhancing conductivity.
Therefore, the correct answer is: resistance increases for conductors and decreases for semiconductors.