What are two characteristics of synchronous calls to APIs? (Choose two.)
A. They can be used only with certain programming languages.
B. They make your application less portable, so asynchronous calls are preferred.
C. They can add perceived latency to your application if data is not received.
D. They block until a response is returned from the servers.
E. They do not block while waiting for the API to be processed.
C. They can add perceived latency to your application if data is not received.
D. They block until a response is returned from the servers.