I want to know the answer to the following question:
What teaching was criticized by Nagarjuna?
All the background I'm provided with is that "Some adherents of Mahayana accept both the early teachings (including in this the Sarvastivada Abhidharma, which was criticized by Nagarjuna and is in fact opposed to early Buddhist thought) and the Mahayana sutras as authentic teachings of Gautama Buddha, and claim they were designed for different types of persons and different levels of spiritual understanding.". Is that enough to answer the question?
Answer: yes