Final answer:
Not all difficulties in creating advertising messages are equal; while complex artwork, multilingual production, and multi-platform content are challenging, using computer-generated animation may not be ineffective and thus is not a necessary deterrent in advertising effectiveness.
Step-by-step explanation:
The difficulties associated with creating an actual advertising message include the time-consuming design of quality artwork, layout, and production, the complex process of translating the copywriter's ideas into an actual advertisement, the need for content across various platforms, and the challenge of shooting commercials in multiple locations and languages for global campaigns. However, replacing actors with computer-generated animation is not inherently ineffective, as it can sometimes be best for developing an appeal depending on the context of the advertisement and the intended audience. The option states that replacing actors with animation is ineffective, while the others mention difficulties related to time-consuming artwork design, complex translation of ideas, content creation for various platforms, and shooting commercials in multiple locations and languages for global campaigns.