The first step in achieving strategic fit between competitive and supply chain strategies is to（ ）

A、understandcustomersandsupplychainuncertainty.
B、matchsupplychainresponsivenesswiththeimplieduncertaintyofdemand.
C、understandthesupplychainandmapitontheresponsivenessspectrum.
D、ensurethatallfunctionalstrategieswithinthesupplychainsupportthesupplychain'slevelofresponsiveness.