What type of a document should Ned send to the vendor?

Ned is the program manager for his organization and he’s considering some new materials for his program. He and his team have never worked with these materials before and he wants to ask the vendor for some additional information, a demon, and even some samples.

What type of a document should Ned send to the vendor?
A . IFB
B . RFQ
C . RFP
D . RFI

Answer: D