Final answer:
The least effective strategy for improving a person's diet among the given options is setting broad goals, as specific, attainable, and actionable goals are more likely to result in successful dietary changes.
Step-by-step explanation:
The ineffective strategy for improving a person's diet is b. setting broad goals. Specific, achievable, and measurable goals are much more effective when trying to make dietary changes.
Explanation: When aiming to enhance one's diet, it is important to set specific goals which are targeted and clear. This allows for a focused approach to dietary improvements and helps to monitor progress. Goals should be simple and easy to remember, reducing the cognitive load and increasing the likelihood that they will be followed. Additionally, making small, acceptable modifications to the diet can lead to sustainable changes without causing a sense of deprivation or overwhelming the individual.
In contrast, broad goals lack specificity and can be too vague to follow or measure effectively. They do not offer clear direction on what changes need to be made or how success can be evaluated. As such, they are not considered an effective strategy for dietary improvement.