While studying for their first market research test, Rowan is confused about the difference between a request$-$for$-$proposal $($RFP$)$ and a research request agreement. They make a flashcard stating that a request$-$for$-$proposal $($RFP$)$ is a document a manager would use for what research$-$related purpose? a$.$ To hire staff for an in$-$house research department b$.$ To ask research providers for proposals and cost estimates for a research projectc. To get authorization from upper management to conduct researchd. To share proposed actions or steps recommended by research