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.

n) Representational State Transfer (REST) works when clients A. determine the current state of the server B. request representations of resources and parse these representation C. recognise control structures that leads to further resources D. change their current state when the new resource is received 0) A suffix is an augmentation to a media type that A. specifies the syntax of that media type. B. is registered and maintained by IANA C. is specified with the 'using' keyword, for example application/collection using jason' D. is essential for any RESTful API p) In search engines, an inverted list may store postings for words containing A. a pointer to all documents that contain a word B. the number of times the word appears in a document C. the stem of the word D. the extent list for the major sections of a document