Answer:
Both option A and B is correct
Step-by-step explanation:
The policy level interventions include guidelines for a development work or practice sustainable.
Here in this case option A is an approach to incorporate green school initiative through policy backing and hence it is being discussed with the lawmakers.
In option B, guidelines for green building is included which is also a policy related intervention to promote sustainable development.
The remaining two options are efforts made at individual level for promoting green and sustainable development.