Why are the Sunga and Kanva dynasties often associated with a 'Brahmanical revival'?

Unlike the Buddhist-patronizing Mauryas, the Sungas and Kanvas were Brahmins who performed Vedic sacrifices like the Ashvamedha.

Fall of Mauryas and Rise of Sunga & Kanva Dynasties

Q: Consider the following statements: 1. The last Mauryan ruler, Brihadratha was assassinated by his commander-in-chief, Pushyamitra Sunga. 2. The last Sunga king, Devabhuti, was assassinated by his Brahmana minister Vasudeva Kanva who usurped the throne. 3. The last ruler of the Kanva dynasty was deposed by the Andhras. Which of these statements is/are correct?

All three statements are correct. Brihadratha (Maurya) was killed by Pushyamitra Sunga, Devabhuti (Sunga) by Vasudeva Kanva, and the Kanvas were deposed by the Andhras.

ID: HIS_ANC_2003_09 Ref: Standard Educational Reference

Consider the following statements:
1. The last Mauryan ruler, Brihadratha was assassinated by his commander-in-chief, Pushyamitra Sunga.
2. The last Sunga king, Devabhuti, was assassinated by his Brahmana minister Vasudeva Kanva who usurped the throne.
3. The last ruler of the Kanva dynasty was deposed by the Andhras.

Which of these statements is/are correct?