Identify the correct sequence of the categories of grapevine communication.

The correct sequence of grapevine categories is single strand chain, gossip chain, probability chain and cluster chain.

Statement 4, single strand chain, comes first, where each person tells just the next in a line.

Statement 3, gossip chain, follows, where one person tells everyone else non-selectively.

Statement 2, probability chain, comes next, where each person passes news to others at random.

Statement 1, cluster chain, comes last, where a person tells a selected few who then tell their own clusters.

This four-fold order is the standard Keith Davis classification of grapevine chains.