Consultant: Advertising in videos purchased for download has shown promise as a way to activate consumers with a specific product message. Because the long-term impact on brand perception have yet not been shown; however, I do not recommend its use at this time.
Client: Your position is inconsistent with your usual practice. You suggest many forms of advertising that are known to have a potential negative brand impact, so concern about long-term brand impact cannot be the real reason you will not recommend this form of advertising.
The client's argument is flawed because it fails to consider that
【选项】
the long-term impact on brand perception of an advertisement can take some time to manifest itself
选项是否正确？