Final answer:
For an unbiased survey about a new soup brand, the best option is to ask customers from every region of the state, as it provides a diverse and representative sample, avoiding selection bias.
Step-by-step explanation:
To acquire unbiased results in a survey to find out whether consumers like or dislike a new brand of soup, the best data collection method from the provided options would be C. ask customers from every region of the state which soup is the best.
This method is likely to yield the most representative and unbiased sample because it does not limit the survey to a subset of consumers that might have specific preferences or biases, such as those associated with the company's employees or the sales team. Instead, it reaches out to a broad and diverse group of consumers, enhancing the reliability of the survey results.
It is essential to avoid selection bias by not restricting the survey to particular locations or groups with a potential vested interest in the product, as this could skew the results. In contrast, option C ensures that the survey encompasses a wide demographic spread across the state, which is more indicative of the general consumer opinion.
Through this approach, the manager can attain data that is more reflective of the overall consumer response to the new soup brand.
Therefore answer is C. ask customers from every region of the state which soup is the best.