What are some of the characteristics of reactive systems? Note: There are 2 correct answers to this question.

What are some of the characteristics of reactive systems? Note: There are 2 correct answers to this question.
A . They can respond quickly on a high volume of API calls.
B. They are defined as responsive, resilient, elastic, and message-driven.
C. They register for callback and returns when calling other services.
D. They operate on the request-response programming model.

Answer: B,C