Which measures are essential to achieve Goal 4 of the Sustainable Development Targets, 2030 ?
1. Making education free and compulsory
2. Improving basic school infrastructure and embracing digital transformation
3. Expansion of agricultural programmes
4. Increasing investment in technology
Select the correct answer from the codes given below:

1. A.1, 2, 3 and 4
2. B.Only 1
3. C.1 and 2
4. D.1, 2 and 3