Final answer:
The question pertains to the CORS policy, which is a security feature that allows cross-origin requests only for certain protocols. The protocols that support such requests are HTTP and HTTPS, with HTTPS being the secure option and the correct answer in this context.
Step-by-step explanation:
The message 'Has been blocked by CORS policy. Cross-origin requests are only supported for protocol schemes related to web development and security. CORS stands for Cross-Origin Resource Sharing, a security feature that restricts web pages from making requests to a domain different from the domain that served the web page. The CORS policy is enforced by web browsers and is intended to prevent malicious scripts from interacting with resources that do not explicitly permit such interactions.
When it comes to protocol schemes that are supported for cross-origin requests, the correct options would be:
These protocols are designed to facilitate communication over the internet in a secure or standard way, respectively. On the other hand, options C) FTP (File Transfer Protocol) and D) TCP (Transmission Control Protocol) are not typically used in web browsers for cross-origin requests.
Given the options and the context of the question, we can choose only one option. The mentioned correct option in the final answer would be B) HTTPS, as it is the secure version of the HTTP protocol and is most commonly used in web applications to comply with security best practices.