Final answer:
Syndicated data used by Ford Consulting in marketing research, which has been previously collected and is commercially available, is best classified as secondary data.
Step-by-step explanation:
Syndicated data refers to commercially available data that has been previously collected by another organization. This type of data would be best classified as B) Secondary data. Secondary data is data that does not result from firsthand research but comes from the already completed work of other researchers or data collected by an agency or organization. It is known for being nonreactive or unobtrusive, meaning that it does not involve direct contact with subjects and will not alter or influence people's behaviors.