The use of sales promotion has increased dramatically over the past 30 years, primarily at the expense of advertising. Thus option (d) is correct.
Advertising is a marketing technique involving paying for space to promote a product, service or cause.
Advertising is known to be the process of sharing information on television, print , radio, and others.
The three main types of advertising in public relations are endorsement advertising, informative advertising, persuasive advertising.
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