India and Pakistan are trying to increase cooperation and build peace in the following ways:
1. Collaboration among social activists and known personalities of the two countries
2. Leaders of both countries meet regularly in summits to understand issues and find solutions
3. Bus routes have started between the two countries
4. Trade has increased

A. 1 and 2

B. 1 and 3

C. 4

D. 1, 2, 3 and 4

Answer: Option D