Consider the following statements:
The conductivity of a metal has negative temperature coefficient since:
1. The electron concentration increase with temperature.
2. The electron mobility decreases with temperature.
3. The electron-lattice scattering rate increases with temperature.
Which of the above statements is/are correct?

A. 1 only

B. 1 and 2

C. 2 and 3

D. 3 only

Answer: Option C