What are two advantages of using model-driven telemetry, such as gRPC, instead of traditional telemetry gathering methods?

What are two advantages of using model-driven telemetry, such as gRPC, instead of traditional telemetry gathering methods? (Choose two.)
A. all data is ad-hoc
B. decentralized storage of telemetry
C. efficient use of bandwidth
D. no overhead
E. continuous information with incremental updates