Final answer:
The two key dimensions that set advertising apart from publicity and personal selling are control and feedback, with advertising giving the firm control over its messaging and a different kind of feedback mechanism. The correct option is B.
Step-by-step explanation:
The two key dimensions of advertising that distinguish it from publicity and personal selling are control and feedback. Unlike publicity, where the source does not have control over whether and how the information is used by the media, in advertising, the firm has full control over the content, timing, and frequency of the message.
Moreover, advertising allows for less direct feedback compared to personal selling where an immediate response can be received and addressed.
The effectiveness of advertising can be seen in how it influences a firm's perceived demand curve, either by making it more inelastic (steeper) or by shifting it to the right (increasing demand), leading to higher prices or quantities sold and thus, increased profits.
Changes in media and technology have impacted traditional advertising venues, pushing companies to explore new methods like internet and social media for their campaigns, which often present more cost-effective solutions. The correct option is B.