Given the definition of the geometric Point class in Listing 15.6 (point. cpp), complete the function named distance: double distance(Point r1, Point r2) {
// Details go here
}

Someone plzz me which of these defines a social search? a. asking a search engine a question that is answered by a real person on the other sideb. modifying search results based on popularity of a web pagec.modifying search results based on a ranking of a web page