Final answer:
The true statement about advertising media is that advertisers must clearly specify a target market to ensure effective media selection. Technological changes have transformed advertising habits, making market research more crucial than ever.
Step-by-step explanation:
Among the statements provided about advertising media, the true statement is A. In order to guarantee good media selection, an advertiser must clearly specify its target market first. The success of an advertising campaign heavily relies on the alignment between the selected media and the advertiser's target market.
With technological changes causing shifts in advertising effectiveness, such as the decline in traditional television and print media advertising, specifying a target market enables advertisers to select media platforms that align with the consuming habits of their intended audience. In today's digital age, the relevance of digital advertising media has indeed increased, but it's crucial for advertisers to still perform thorough market research to ensure that the advertising medium chosen reaches their actual potential customers effectively and efficiently.