- (A) is true: The Kushanas were known to use high-sounding titles such as devaputras (sons of gods).
- (B) is true: Religious donations were made by people for the well-being of the kings, a common practice under the Kushanas.
- (C) is true: The institution of devakulas involved housing statues of deceased rulers, a significant feature of Kushana rule.
- (D) is false: While Buddhism and Jainism thrived, other religions, including local cults and Vedic traditions, also coexisted under the Kushanas.
Hence, the correct answer is (A), (B), and (C) only.