Final answer:
Television and radio are not traditional forms of digital marketing because they predate the digital era, whereas banners, such as online banner ads, are considered a part of it.
Step-by-step explanation:
The question regarding which option is not a traditional form of digital marketing has a slightly tricky wording. Traditional digital marketing typically includes methods that are heavily dependent on the internet, so, among the choices given (Television, Radio, Banners), Television and Radio are generally not considered traditional forms of digital marketing because they existed well before the advent of digital technology. Therefore, banners, which can be found online (e.g., banner ads), are part of traditional digital marketing. The correct answer, which is not a traditional form of digital marketing, is either 'a) Television' or 'b) Radio'.