You are given a group of sites and you want to set up a network between them. In other words, you want to set up point-to-point connections between certain sites such that every site is connected to every other site through a certain number of point-to-point connections. Unfortunately, each point-to-point connection has a cost associated with it. Therefore, you want to find a way to set up this network such that it costs you the least amount of money.
Which of the following methods are the most efficient way to find a network of sites with minimum cost? There may be more than one answer. Select ALL that apply.