As temperature increases, the electrical resistivities of pure metals $$\left( {\rho m} \right)$$  and intrinsic semiconductors $$\left( {\rho s} \right)$$  vary as follows

A. Both $$\rho m$$  and $$\rho s$$  increase

B. Both $$\rho m$$  and $$\rho s$$  decrease

C. $$\rho m$$  increases and $$\rho s$$  decreases

D. $$\rho m$$  decreases and $$\rho s$$  increases

Answer: Option C