Unlike PR,advertising has which of the following disadvantages?

A) The lack of research decreases credibility.
B) Gatekeepers charge high fees.
C) Audience attention is not guaranteed.
D) Production costs are unpredictable.

While advertising can reach a large audience, there is no guarantee that the audience will actually pay attention to the ad. This can be a disadvantage compared to PR, which often relies on earned media and endorsements from trusted sources, making it more likely to capture audience attention. The other options listed are not necessarily disadvantages of advertising. Research can still be conducted to increase credibility, gatekeeper fees can vary and be negotiated, and production costs can be estimated and budgeted for.