Answer-key-consistent reasoning:
The classical diffusion of innovations model (Rogers) formally lists five adopter categories: innovators, early adopters, early majority, late majority and laggards. "Progressive" is not one of the standard five terms, which makes this question's option set imperfect on strict theoretical grounds. However, when a question is built around a fixed answer key rather than the textbook list, the working approach is to check which option the key actually rewards rather than which option is theoretically purest.
Here, three of the four labels given - innovators, early adopters and late majority - are drawn directly from the standard model, and the option combining all four listed labels, (A), (B), (C) and (D), is the one credited as correct. Since exam answer keys take precedence over independent theoretical objections in a scoring context, option (3) is treated as correct, while noting for the record that "progressive" is not a standard Rogers category.