The correct answer is D: Transmissions intended for reception by the general public. According to FCC Part 97.3(a)(10), broadcasting is defined as transmissions intended for reception by the general public, rather than specific amateur stations or operators. This definition distinguishes broadcasting from normal amateur radio communications, which are point-to-point or point-to-multipoint communications between licensed amateur operators. The key element is the intended audience: if transmissions are meant for the general public (anyone who happens to be listening), it's broadcasting. Amateur radio communications are intended for other licensed amateur operators, not the general public. This prohibition ensures that amateur radio remains a two-way communication service for licensed operators, not a one-way broadcast service to the public.