thE rEAsons why thE invEntions FAilED to DElivEr to invEstors thE ExpECtED rEwArDs inCluDE All thE Following ExCEpt ________.
A．thE poliCiEs oF thE stAtEs
B．thE Following innovAtions
C．thE CommErCiAlizAtion oF thE invEntion
D．thE CompEtition From thE lAttEr imitAtion