1) The aging of our population will have far-reaching implications for what life will be like in the years to come. (2) For one thing, society will need to provide many support services to the frail elderly, because many of them will have outlived their savings and will not be able to pay for their own care. (3) Moreover, as the over-65 population becomes more influential at the polls and in the marketplace, we're likely to see changes in governmental programs, in television programming, in new products, in housing patterns, in population shifts from state to state, and so forth. (4) The effects of this change are virtually infinite. The main patterns of organization of the selection are

A definition-example and time order
B list of items and cause-effect
C comparison and time order.