C. It is not specific and measurable.
The objective of creating positive feelings about the brand is too broad and vague. It doesn't specify how the marketing team will measure success or what specific actions they will take to achieve the objective. Without clear, measurable goals, it will be difficult to determine whether the marketing plan has been successful or not. A more effective marketing objective would be specific and measurable, such as "Increase brand awareness among millennials by 25% in the next six months."