Identify a true statement about branded "black$-$box" methodologies.

Multiple choice question.

They comprise proprietary scaling, sampling, sample correction, data collection methods, market segmentation, and specialized indexes.

A research firm usually forces clients to choose black$-$box methodologies if they lack sufficient insight into a method's strengths prior to purchase.

The information about how these methodologies work is provided by research firms.

They focus solely on sample development and brand$-$name selection.