You have created an HTTP(S) load balanced service. You need to verify that your backend instances are responding properly.
How should you configure the health check?

A. Set request-path to a specific URL used for health checking, and set proxy-header to PROXY_V1. B. Set request-path to a specific URL used for health checking, and set host to include a custom host header that identifies the health check. C. Set request-path to a specific URL used for health checking, and set response to a string that the backend service will always return in the response body. D. Set proxy-header to the default value, and set host to include a custom host header that identifies the health check.