Your development team has been asked to refactor an existing monolithic application into a set of composable microservices. Which design aspects should you implement for the new application? (Choose two.)

A. Develop the microservice code in the same programming language used by the microservice caller. B. Create an API contract agreement between the microservice implementation and microservice caller. C. Require asynchronous communications between all microservice implementations and microservice callers. D. Ensure that sufficient instances of the microservice are running to accommodate the performance requirements. E. Implement a versioning scheme to permit future changes that could be incompatible with the current interface.