Answer completely and carefully based on web services for thumbs up.

From the four options in each part, state the correct letter and reason why you say that is correct letter.

a) Search engines cannot discover the web pages of the deep web because these pages A. may be written in rare natural languages that are difficult for computer programs to parse B. may contain client-side scripting code C. may require filling web forms with data D. may be protected by CAPTCHAS b) When implementing a RESTful API, A. all implementers must use the same programming languages B. client application developers must use the same programming languages that the API implementers have used to implement the API. C. API implementers are free to choose the programming language they like D. client applications must be written using a RESTful framework like Django c) When naming URIS for linked data entities, the URI should be A. easily understood by humans. B. one of the predefined W3C standard entities. C. free of any fragment identifiers. D. none of the above. d) In a RESTful system, A. The server maintains information about the state of all clients B. The client should maintain state information about its own transitions C. Both the server and the client maintain state information about each other. D. The server serves each request on its own merits regardless of any previous requests