Final answer:
Interviews and surveys are effective for objective data collection in market research, while TV adverts are not ideal for detailed information gathering.
Explanation:
Interviews and surveys are commonly used methods to gather information for market research. These methods allow for objective data collection without biases from personal viewpoints. However, TV adverts are not a suitable method for obtaining detailed information or feedback as they are more focused on reaching a broad audience rather than collecting specific data.
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