Which of the following statements are true?
1. Digital dashboards, empowerment are methods of HRD.
2. It is believed that human supply are heterogeneous as each human is different from one another.
3. The Lev and Schwartz model calculates the present value of estimated future earnings.
4. The economic value approach of HRA has been given by Schwartz.

A. 1, 2 and 3 are true, 4 is false

B. 1 and 2 are true, 3 and 4 are false

C. 3 is true, 1, 2 and 4 are false

D. 2 and 3 are true, 1 and 4 are false

Answer: Option A